Get a deeper look into your health.
Schedule online, results in a week
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PCOS Symptoms Explained
Learn the common symptoms of PCOS and which blood tests can help confirm hormone imbalances in this Mito Health guide.
Written by
Mito Health
PCOS Symptoms Explained: What Your Body May Be Telling You
Polycystic Ovary Syndrome (PCOS) is a common hormone condition that affects up to 12% of women of reproductive age. Yet many people live with symptoms for years before getting answers.
Understanding PCOS symptoms is often the first step toward clarity. Some signs are obvious, like irregular periods or acne. Others, such as insulin resistance or hormonal shifts, are happening quietly inside the body.
What Is PCOS? A Quick Overview
In a nutshell, PCOS is a hormonal and metabolic condition. It affects how the ovaries function, how the body regulates insulin, and causes problems getting pregnant, weight gain, type 2 diabetes, and more.
Two major factors drive most PCOS symptoms:
Androgens: Often called male hormones, like testosterone. When androgen levels are high, it disrupts ovulation, skin health, and hair growth.
Insulin resistance: Happens when the body does not respond well to insulin. Higher insulin levels can stimulate the ovaries to produce more androgens. It’s also very common in PCOS and increases the risk of type 2 diabetes in women.
8 Common PCOS Symptoms Explained
PCOS symptoms can look different for every woman. Some people struggle with acne and hair growth. Others mainly notice irregular cycles or difficulty getting pregnant. With that, PCOS exists on a spectrum, and symptoms alone do not tell the full story.
1. Irregular Periods and Ovulation Changes
Irregular menstrual cycles are a well-known symptom of PCOS. Irregular periods mean there are fewer than 8 per year and cycles lasting longer than 35 days. Skipping months and unpredictable or heavy bleeding also indicate irregular cycles. These changes happen because ovulation does not occur consistently.
Blood Tests That Help Explain Cycle Changes
LH (Luteinizing Hormone)
FSH (Follicle-Stimulating Hormone)
Estradiol
Progesterone (to confirm ovulation)
An elevated LH-to-FSH ratio is sometimes seen in PCOS. In fact, many individuals with PCOS have normal LH and FSH levels, so the results are more supportive than diagnostic. Low progesterone may suggest that ovulation is not occurring regularly. A comprehensive hormone panel can help identify whether cycle changes are related to PCOS or another condition.
2. Acne, Oily Skin, and Hormonal Breakouts
Acne that won’t go away, especially along the jawline and chin, is a common symptom of PCOS. Higher testosterone levels increase sebum production in the skin, so you’ll notice more acne caused by excess oil clogging the pores and contributing to inflammation.
If acne continues beyond teenage years or resists typical skincare treatments, hormone testing may be helpful.
Hormone Panels That Check Testosterone Levels
Total testosterone
Free testosterone
DHEA-S (an adrenal androgen)
Sex Hormone-Binding Globulin (SHBG)
Low SHBG means more testosterone remains “free” and active in the bloodstream. This can worsen acne, excess hair growth, and scalp hair thinning, even if total testosterone levels appear normal.
3. Excess Facial or Body Hair (Hirsutism)
Unwanted hair growth on the chin, upper lip, chest, or abdomen is another sign of PCOS. Hair growth patterns change because hair follicles respond to androgens. When testosterone levels are elevated, hair may grow thicker and darker in areas typically associated with male-pattern growth.
Lab Tests That Evaluate Androgen Excess
Total and free testosterone
DHEA-S
Androstenedione
These markers help confirm whether androgen levels are contributing to symptoms.
4. Thinning Hair or Hair Loss
While some people experience excess hair growth, others may experience hair thinning. Elevated androgens can shrink scalp hair follicles. Over time, this may cause gradual thinning or androgenetic alopecia, especially at the crown.
Related Hormone and Nutrient Testing
Thyroid function (TSH, Free T4)
Ferritin (iron stores)
Vitamin D
In addition to androgen testing, it can be useful to check these markers to help rule out other causes of hair loss.
5. Weight Gain and Insulin Resistance
Up to 80% of people with PCOS experience insulin resistance. When you have insulin resistance, your body stores more fat and experiences more intense hunger signals. That’s why weight gain, especially around the abdomen, is a common symptom of PCOS. Higher insulin levels also stimulate androgen production.
Glucose, Insulin, and Metabolic Markers to Check
Fasting glucose
Fasting insulin
HbA1c
Lipid profile
These markers assess blood sugar control and cardiovascular risk. At Mito Health, comprehensive metabolic panels can identify early insulin resistance, even before diabetes develops.
6. Darkened Skin Patches (Acanthosis Nigricans)
Dark, velvety patches of skin on the neck or underarms may signal insulin resistance. Acanthosis nigricans occurs when high insulin levels stimulate skin cells to grow more rapidly.
Blood Sugar and Insulin Testing
Fasting insulin and glucose testing can help confirm the presence of insulin resistance.
Early detection allows individuals to make lifestyle changes before complications develop.
7. Fertility Challenges and PCOS
PCOS is one of the leading causes of ovulatory infertility or inability to get pregnant due to a lack of ovulation. Without regular ovulation to track, it becomes harder to predict fertile windows.
LH, FSH, and Progesterone Testing
Testing LH and FSH helps evaluate ovarian signaling. Measuring progesterone during the luteal phase can confirm whether ovulation occurred. Understanding these patterns empowers informed conversations with healthcare providers.
8. Mood Changes and Energy Fluctuations
Hormones affect more than reproductive health. Some people with PCOS experience anxiety, low mood, fatigue, and brain fog. Insulin resistance and chronic inflammation may also contribute to mood changes.
Thyroid and Nutrient Markers to Consider
Thyroid panel
Vitamin B12
Vitamin D
Iron markers
Identifying imbalances can help explain energy and mood changes.
When to Get Tested for PCOS Symptoms
If you notice multiple symptoms that have persisted for several months, consider testing. Most clinicians diagnose PCOS using the Rotterdam Criteria, when at least two of the following symptoms are present:
Irregular ovulation
Elevated androgens (clinical signs or blood test results)
Polycystic ovaries on ultrasound
Blood testing for PCOS plays a key role in confirming hormone patterns and ruling out other conditions. Comprehensive hormone and metabolic testing provides a data-driven view of your health. Instead of guessing, you can understand exactly what is happening inside your body.
Understanding PCOS Symptoms Is the First Step
If you're dealing with PCOS, you might notice changes in your skin, mood, weight, and cycles. These symptoms usually stem from hormone imbalances and insulin issues. The good news is that you can get clear answers through lab tests.
Getting your blood tested is one way to diagnose PCOS. It helps pinpoint if you have high androgens, insulin resistance, or thyroid problems that might be causing these issues. If you're experiencing ongoing PCOS symptoms, start with a thorough blood test.
Mito Health offers a Core Comprehensive Panel that checks over 100 biomarkers, including markers for PCOS, such as estradiol, SHBG, progesterone, and more. Become a member today and get access to advanced hormone panels and metabolic testing designed to provide clarity and actionable insights.
Frequently Asked Questions
What are the most common symptoms of PCOS?
Symptoms can vary from person to person. It includes irregular or missed periods, persistent acne, excess facial or body hair, scalp thinning, weight gain, and difficulty getting pregnant. Some people also experience darkened skin patches and mood changes.
Can you have PCOS symptoms even if your periods are regular?
Yes. Some people have regular periods but still experience other PCOS symptoms such as acne, excess hair growth, or insulin resistance. Diagnosis is based on a combination of symptoms, hormone levels, and, sometimes, ultrasound findings, not just on cycle patterns.
What blood tests help identify PCOS?
Common blood tests include total and free testosterone, DHEA-S, LH, FSH, fasting insulin, fasting glucose, HbA1c, thyroid markers, and lipid profile. These tests help assess hormone balance, ovulation patterns, and metabolic health.
Is insulin resistance always present in PCOS?
Not always, but it is very common. Many people with PCOS have some degree of insulin resistance, even if their blood sugar levels are still normal. Testing fasting insulin and glucose can help detect early metabolic changes.
When should I get tested for PCOS?
Consider testing if you have irregular periods, persistent acne, excess hair growth, unexplained weight gain, or fertility challenges lasting several months. A comprehensive hormone and metabolic panel can provide clarity and help guide next steps.
Related Articles
Resources
Get a deeper look into your health.
Schedule online, results in a week
Clear guidance, follow-up care available
HSA/FSA Eligible
Comments
Get a deeper look into your health.
Schedule online, results in a week
Clear guidance, follow-up care available
HSA/FSA Eligible
PCOS Symptoms Explained
Learn the common symptoms of PCOS and which blood tests can help confirm hormone imbalances in this Mito Health guide.
Written by
Mito Health
PCOS Symptoms Explained: What Your Body May Be Telling You
Polycystic Ovary Syndrome (PCOS) is a common hormone condition that affects up to 12% of women of reproductive age. Yet many people live with symptoms for years before getting answers.
Understanding PCOS symptoms is often the first step toward clarity. Some signs are obvious, like irregular periods or acne. Others, such as insulin resistance or hormonal shifts, are happening quietly inside the body.
What Is PCOS? A Quick Overview
In a nutshell, PCOS is a hormonal and metabolic condition. It affects how the ovaries function, how the body regulates insulin, and causes problems getting pregnant, weight gain, type 2 diabetes, and more.
Two major factors drive most PCOS symptoms:
Androgens: Often called male hormones, like testosterone. When androgen levels are high, it disrupts ovulation, skin health, and hair growth.
Insulin resistance: Happens when the body does not respond well to insulin. Higher insulin levels can stimulate the ovaries to produce more androgens. It’s also very common in PCOS and increases the risk of type 2 diabetes in women.
8 Common PCOS Symptoms Explained
PCOS symptoms can look different for every woman. Some people struggle with acne and hair growth. Others mainly notice irregular cycles or difficulty getting pregnant. With that, PCOS exists on a spectrum, and symptoms alone do not tell the full story.
1. Irregular Periods and Ovulation Changes
Irregular menstrual cycles are a well-known symptom of PCOS. Irregular periods mean there are fewer than 8 per year and cycles lasting longer than 35 days. Skipping months and unpredictable or heavy bleeding also indicate irregular cycles. These changes happen because ovulation does not occur consistently.
Blood Tests That Help Explain Cycle Changes
LH (Luteinizing Hormone)
FSH (Follicle-Stimulating Hormone)
Estradiol
Progesterone (to confirm ovulation)
An elevated LH-to-FSH ratio is sometimes seen in PCOS. In fact, many individuals with PCOS have normal LH and FSH levels, so the results are more supportive than diagnostic. Low progesterone may suggest that ovulation is not occurring regularly. A comprehensive hormone panel can help identify whether cycle changes are related to PCOS or another condition.
2. Acne, Oily Skin, and Hormonal Breakouts
Acne that won’t go away, especially along the jawline and chin, is a common symptom of PCOS. Higher testosterone levels increase sebum production in the skin, so you’ll notice more acne caused by excess oil clogging the pores and contributing to inflammation.
If acne continues beyond teenage years or resists typical skincare treatments, hormone testing may be helpful.
Hormone Panels That Check Testosterone Levels
Total testosterone
Free testosterone
DHEA-S (an adrenal androgen)
Sex Hormone-Binding Globulin (SHBG)
Low SHBG means more testosterone remains “free” and active in the bloodstream. This can worsen acne, excess hair growth, and scalp hair thinning, even if total testosterone levels appear normal.
3. Excess Facial or Body Hair (Hirsutism)
Unwanted hair growth on the chin, upper lip, chest, or abdomen is another sign of PCOS. Hair growth patterns change because hair follicles respond to androgens. When testosterone levels are elevated, hair may grow thicker and darker in areas typically associated with male-pattern growth.
Lab Tests That Evaluate Androgen Excess
Total and free testosterone
DHEA-S
Androstenedione
These markers help confirm whether androgen levels are contributing to symptoms.
4. Thinning Hair or Hair Loss
While some people experience excess hair growth, others may experience hair thinning. Elevated androgens can shrink scalp hair follicles. Over time, this may cause gradual thinning or androgenetic alopecia, especially at the crown.
Related Hormone and Nutrient Testing
Thyroid function (TSH, Free T4)
Ferritin (iron stores)
Vitamin D
In addition to androgen testing, it can be useful to check these markers to help rule out other causes of hair loss.
5. Weight Gain and Insulin Resistance
Up to 80% of people with PCOS experience insulin resistance. When you have insulin resistance, your body stores more fat and experiences more intense hunger signals. That’s why weight gain, especially around the abdomen, is a common symptom of PCOS. Higher insulin levels also stimulate androgen production.
Glucose, Insulin, and Metabolic Markers to Check
Fasting glucose
Fasting insulin
HbA1c
Lipid profile
These markers assess blood sugar control and cardiovascular risk. At Mito Health, comprehensive metabolic panels can identify early insulin resistance, even before diabetes develops.
6. Darkened Skin Patches (Acanthosis Nigricans)
Dark, velvety patches of skin on the neck or underarms may signal insulin resistance. Acanthosis nigricans occurs when high insulin levels stimulate skin cells to grow more rapidly.
Blood Sugar and Insulin Testing
Fasting insulin and glucose testing can help confirm the presence of insulin resistance.
Early detection allows individuals to make lifestyle changes before complications develop.
7. Fertility Challenges and PCOS
PCOS is one of the leading causes of ovulatory infertility or inability to get pregnant due to a lack of ovulation. Without regular ovulation to track, it becomes harder to predict fertile windows.
LH, FSH, and Progesterone Testing
Testing LH and FSH helps evaluate ovarian signaling. Measuring progesterone during the luteal phase can confirm whether ovulation occurred. Understanding these patterns empowers informed conversations with healthcare providers.
8. Mood Changes and Energy Fluctuations
Hormones affect more than reproductive health. Some people with PCOS experience anxiety, low mood, fatigue, and brain fog. Insulin resistance and chronic inflammation may also contribute to mood changes.
Thyroid and Nutrient Markers to Consider
Thyroid panel
Vitamin B12
Vitamin D
Iron markers
Identifying imbalances can help explain energy and mood changes.
When to Get Tested for PCOS Symptoms
If you notice multiple symptoms that have persisted for several months, consider testing. Most clinicians diagnose PCOS using the Rotterdam Criteria, when at least two of the following symptoms are present:
Irregular ovulation
Elevated androgens (clinical signs or blood test results)
Polycystic ovaries on ultrasound
Blood testing for PCOS plays a key role in confirming hormone patterns and ruling out other conditions. Comprehensive hormone and metabolic testing provides a data-driven view of your health. Instead of guessing, you can understand exactly what is happening inside your body.
Understanding PCOS Symptoms Is the First Step
If you're dealing with PCOS, you might notice changes in your skin, mood, weight, and cycles. These symptoms usually stem from hormone imbalances and insulin issues. The good news is that you can get clear answers through lab tests.
Getting your blood tested is one way to diagnose PCOS. It helps pinpoint if you have high androgens, insulin resistance, or thyroid problems that might be causing these issues. If you're experiencing ongoing PCOS symptoms, start with a thorough blood test.
Mito Health offers a Core Comprehensive Panel that checks over 100 biomarkers, including markers for PCOS, such as estradiol, SHBG, progesterone, and more. Become a member today and get access to advanced hormone panels and metabolic testing designed to provide clarity and actionable insights.
Frequently Asked Questions
What are the most common symptoms of PCOS?
Symptoms can vary from person to person. It includes irregular or missed periods, persistent acne, excess facial or body hair, scalp thinning, weight gain, and difficulty getting pregnant. Some people also experience darkened skin patches and mood changes.
Can you have PCOS symptoms even if your periods are regular?
Yes. Some people have regular periods but still experience other PCOS symptoms such as acne, excess hair growth, or insulin resistance. Diagnosis is based on a combination of symptoms, hormone levels, and, sometimes, ultrasound findings, not just on cycle patterns.
What blood tests help identify PCOS?
Common blood tests include total and free testosterone, DHEA-S, LH, FSH, fasting insulin, fasting glucose, HbA1c, thyroid markers, and lipid profile. These tests help assess hormone balance, ovulation patterns, and metabolic health.
Is insulin resistance always present in PCOS?
Not always, but it is very common. Many people with PCOS have some degree of insulin resistance, even if their blood sugar levels are still normal. Testing fasting insulin and glucose can help detect early metabolic changes.
When should I get tested for PCOS?
Consider testing if you have irregular periods, persistent acne, excess hair growth, unexplained weight gain, or fertility challenges lasting several months. A comprehensive hormone and metabolic panel can provide clarity and help guide next steps.
Related Articles
Resources
Get a deeper look into your health.
Schedule online, results in a week
Clear guidance, follow-up care available
HSA/FSA Eligible
Comments
PCOS Symptoms Explained
Learn the common symptoms of PCOS and which blood tests can help confirm hormone imbalances in this Mito Health guide.
Written by
Mito Health
PCOS Symptoms Explained: What Your Body May Be Telling You
Polycystic Ovary Syndrome (PCOS) is a common hormone condition that affects up to 12% of women of reproductive age. Yet many people live with symptoms for years before getting answers.
Understanding PCOS symptoms is often the first step toward clarity. Some signs are obvious, like irregular periods or acne. Others, such as insulin resistance or hormonal shifts, are happening quietly inside the body.
What Is PCOS? A Quick Overview
In a nutshell, PCOS is a hormonal and metabolic condition. It affects how the ovaries function, how the body regulates insulin, and causes problems getting pregnant, weight gain, type 2 diabetes, and more.
Two major factors drive most PCOS symptoms:
Androgens: Often called male hormones, like testosterone. When androgen levels are high, it disrupts ovulation, skin health, and hair growth.
Insulin resistance: Happens when the body does not respond well to insulin. Higher insulin levels can stimulate the ovaries to produce more androgens. It’s also very common in PCOS and increases the risk of type 2 diabetes in women.
8 Common PCOS Symptoms Explained
PCOS symptoms can look different for every woman. Some people struggle with acne and hair growth. Others mainly notice irregular cycles or difficulty getting pregnant. With that, PCOS exists on a spectrum, and symptoms alone do not tell the full story.
1. Irregular Periods and Ovulation Changes
Irregular menstrual cycles are a well-known symptom of PCOS. Irregular periods mean there are fewer than 8 per year and cycles lasting longer than 35 days. Skipping months and unpredictable or heavy bleeding also indicate irregular cycles. These changes happen because ovulation does not occur consistently.
Blood Tests That Help Explain Cycle Changes
LH (Luteinizing Hormone)
FSH (Follicle-Stimulating Hormone)
Estradiol
Progesterone (to confirm ovulation)
An elevated LH-to-FSH ratio is sometimes seen in PCOS. In fact, many individuals with PCOS have normal LH and FSH levels, so the results are more supportive than diagnostic. Low progesterone may suggest that ovulation is not occurring regularly. A comprehensive hormone panel can help identify whether cycle changes are related to PCOS or another condition.
2. Acne, Oily Skin, and Hormonal Breakouts
Acne that won’t go away, especially along the jawline and chin, is a common symptom of PCOS. Higher testosterone levels increase sebum production in the skin, so you’ll notice more acne caused by excess oil clogging the pores and contributing to inflammation.
If acne continues beyond teenage years or resists typical skincare treatments, hormone testing may be helpful.
Hormone Panels That Check Testosterone Levels
Total testosterone
Free testosterone
DHEA-S (an adrenal androgen)
Sex Hormone-Binding Globulin (SHBG)
Low SHBG means more testosterone remains “free” and active in the bloodstream. This can worsen acne, excess hair growth, and scalp hair thinning, even if total testosterone levels appear normal.
3. Excess Facial or Body Hair (Hirsutism)
Unwanted hair growth on the chin, upper lip, chest, or abdomen is another sign of PCOS. Hair growth patterns change because hair follicles respond to androgens. When testosterone levels are elevated, hair may grow thicker and darker in areas typically associated with male-pattern growth.
Lab Tests That Evaluate Androgen Excess
Total and free testosterone
DHEA-S
Androstenedione
These markers help confirm whether androgen levels are contributing to symptoms.
4. Thinning Hair or Hair Loss
While some people experience excess hair growth, others may experience hair thinning. Elevated androgens can shrink scalp hair follicles. Over time, this may cause gradual thinning or androgenetic alopecia, especially at the crown.
Related Hormone and Nutrient Testing
Thyroid function (TSH, Free T4)
Ferritin (iron stores)
Vitamin D
In addition to androgen testing, it can be useful to check these markers to help rule out other causes of hair loss.
5. Weight Gain and Insulin Resistance
Up to 80% of people with PCOS experience insulin resistance. When you have insulin resistance, your body stores more fat and experiences more intense hunger signals. That’s why weight gain, especially around the abdomen, is a common symptom of PCOS. Higher insulin levels also stimulate androgen production.
Glucose, Insulin, and Metabolic Markers to Check
Fasting glucose
Fasting insulin
HbA1c
Lipid profile
These markers assess blood sugar control and cardiovascular risk. At Mito Health, comprehensive metabolic panels can identify early insulin resistance, even before diabetes develops.
6. Darkened Skin Patches (Acanthosis Nigricans)
Dark, velvety patches of skin on the neck or underarms may signal insulin resistance. Acanthosis nigricans occurs when high insulin levels stimulate skin cells to grow more rapidly.
Blood Sugar and Insulin Testing
Fasting insulin and glucose testing can help confirm the presence of insulin resistance.
Early detection allows individuals to make lifestyle changes before complications develop.
7. Fertility Challenges and PCOS
PCOS is one of the leading causes of ovulatory infertility or inability to get pregnant due to a lack of ovulation. Without regular ovulation to track, it becomes harder to predict fertile windows.
LH, FSH, and Progesterone Testing
Testing LH and FSH helps evaluate ovarian signaling. Measuring progesterone during the luteal phase can confirm whether ovulation occurred. Understanding these patterns empowers informed conversations with healthcare providers.
8. Mood Changes and Energy Fluctuations
Hormones affect more than reproductive health. Some people with PCOS experience anxiety, low mood, fatigue, and brain fog. Insulin resistance and chronic inflammation may also contribute to mood changes.
Thyroid and Nutrient Markers to Consider
Thyroid panel
Vitamin B12
Vitamin D
Iron markers
Identifying imbalances can help explain energy and mood changes.
When to Get Tested for PCOS Symptoms
If you notice multiple symptoms that have persisted for several months, consider testing. Most clinicians diagnose PCOS using the Rotterdam Criteria, when at least two of the following symptoms are present:
Irregular ovulation
Elevated androgens (clinical signs or blood test results)
Polycystic ovaries on ultrasound
Blood testing for PCOS plays a key role in confirming hormone patterns and ruling out other conditions. Comprehensive hormone and metabolic testing provides a data-driven view of your health. Instead of guessing, you can understand exactly what is happening inside your body.
Understanding PCOS Symptoms Is the First Step
If you're dealing with PCOS, you might notice changes in your skin, mood, weight, and cycles. These symptoms usually stem from hormone imbalances and insulin issues. The good news is that you can get clear answers through lab tests.
Getting your blood tested is one way to diagnose PCOS. It helps pinpoint if you have high androgens, insulin resistance, or thyroid problems that might be causing these issues. If you're experiencing ongoing PCOS symptoms, start with a thorough blood test.
Mito Health offers a Core Comprehensive Panel that checks over 100 biomarkers, including markers for PCOS, such as estradiol, SHBG, progesterone, and more. Become a member today and get access to advanced hormone panels and metabolic testing designed to provide clarity and actionable insights.
Frequently Asked Questions
What are the most common symptoms of PCOS?
Symptoms can vary from person to person. It includes irregular or missed periods, persistent acne, excess facial or body hair, scalp thinning, weight gain, and difficulty getting pregnant. Some people also experience darkened skin patches and mood changes.
Can you have PCOS symptoms even if your periods are regular?
Yes. Some people have regular periods but still experience other PCOS symptoms such as acne, excess hair growth, or insulin resistance. Diagnosis is based on a combination of symptoms, hormone levels, and, sometimes, ultrasound findings, not just on cycle patterns.
What blood tests help identify PCOS?
Common blood tests include total and free testosterone, DHEA-S, LH, FSH, fasting insulin, fasting glucose, HbA1c, thyroid markers, and lipid profile. These tests help assess hormone balance, ovulation patterns, and metabolic health.
Is insulin resistance always present in PCOS?
Not always, but it is very common. Many people with PCOS have some degree of insulin resistance, even if their blood sugar levels are still normal. Testing fasting insulin and glucose can help detect early metabolic changes.
When should I get tested for PCOS?
Consider testing if you have irregular periods, persistent acne, excess hair growth, unexplained weight gain, or fertility challenges lasting several months. A comprehensive hormone and metabolic panel can provide clarity and help guide next steps.
Related Articles
Resources
Get a deeper look into your health.
Schedule online, results in a week
Clear guidance, follow-up care available
HSA/FSA Eligible
Comments
PCOS Symptoms Explained
Learn the common symptoms of PCOS and which blood tests can help confirm hormone imbalances in this Mito Health guide.
Written by
Mito Health
PCOS Symptoms Explained: What Your Body May Be Telling You
Polycystic Ovary Syndrome (PCOS) is a common hormone condition that affects up to 12% of women of reproductive age. Yet many people live with symptoms for years before getting answers.
Understanding PCOS symptoms is often the first step toward clarity. Some signs are obvious, like irregular periods or acne. Others, such as insulin resistance or hormonal shifts, are happening quietly inside the body.
What Is PCOS? A Quick Overview
In a nutshell, PCOS is a hormonal and metabolic condition. It affects how the ovaries function, how the body regulates insulin, and causes problems getting pregnant, weight gain, type 2 diabetes, and more.
Two major factors drive most PCOS symptoms:
Androgens: Often called male hormones, like testosterone. When androgen levels are high, it disrupts ovulation, skin health, and hair growth.
Insulin resistance: Happens when the body does not respond well to insulin. Higher insulin levels can stimulate the ovaries to produce more androgens. It’s also very common in PCOS and increases the risk of type 2 diabetes in women.
8 Common PCOS Symptoms Explained
PCOS symptoms can look different for every woman. Some people struggle with acne and hair growth. Others mainly notice irregular cycles or difficulty getting pregnant. With that, PCOS exists on a spectrum, and symptoms alone do not tell the full story.
1. Irregular Periods and Ovulation Changes
Irregular menstrual cycles are a well-known symptom of PCOS. Irregular periods mean there are fewer than 8 per year and cycles lasting longer than 35 days. Skipping months and unpredictable or heavy bleeding also indicate irregular cycles. These changes happen because ovulation does not occur consistently.
Blood Tests That Help Explain Cycle Changes
LH (Luteinizing Hormone)
FSH (Follicle-Stimulating Hormone)
Estradiol
Progesterone (to confirm ovulation)
An elevated LH-to-FSH ratio is sometimes seen in PCOS. In fact, many individuals with PCOS have normal LH and FSH levels, so the results are more supportive than diagnostic. Low progesterone may suggest that ovulation is not occurring regularly. A comprehensive hormone panel can help identify whether cycle changes are related to PCOS or another condition.
2. Acne, Oily Skin, and Hormonal Breakouts
Acne that won’t go away, especially along the jawline and chin, is a common symptom of PCOS. Higher testosterone levels increase sebum production in the skin, so you’ll notice more acne caused by excess oil clogging the pores and contributing to inflammation.
If acne continues beyond teenage years or resists typical skincare treatments, hormone testing may be helpful.
Hormone Panels That Check Testosterone Levels
Total testosterone
Free testosterone
DHEA-S (an adrenal androgen)
Sex Hormone-Binding Globulin (SHBG)
Low SHBG means more testosterone remains “free” and active in the bloodstream. This can worsen acne, excess hair growth, and scalp hair thinning, even if total testosterone levels appear normal.
3. Excess Facial or Body Hair (Hirsutism)
Unwanted hair growth on the chin, upper lip, chest, or abdomen is another sign of PCOS. Hair growth patterns change because hair follicles respond to androgens. When testosterone levels are elevated, hair may grow thicker and darker in areas typically associated with male-pattern growth.
Lab Tests That Evaluate Androgen Excess
Total and free testosterone
DHEA-S
Androstenedione
These markers help confirm whether androgen levels are contributing to symptoms.
4. Thinning Hair or Hair Loss
While some people experience excess hair growth, others may experience hair thinning. Elevated androgens can shrink scalp hair follicles. Over time, this may cause gradual thinning or androgenetic alopecia, especially at the crown.
Related Hormone and Nutrient Testing
Thyroid function (TSH, Free T4)
Ferritin (iron stores)
Vitamin D
In addition to androgen testing, it can be useful to check these markers to help rule out other causes of hair loss.
5. Weight Gain and Insulin Resistance
Up to 80% of people with PCOS experience insulin resistance. When you have insulin resistance, your body stores more fat and experiences more intense hunger signals. That’s why weight gain, especially around the abdomen, is a common symptom of PCOS. Higher insulin levels also stimulate androgen production.
Glucose, Insulin, and Metabolic Markers to Check
Fasting glucose
Fasting insulin
HbA1c
Lipid profile
These markers assess blood sugar control and cardiovascular risk. At Mito Health, comprehensive metabolic panels can identify early insulin resistance, even before diabetes develops.
6. Darkened Skin Patches (Acanthosis Nigricans)
Dark, velvety patches of skin on the neck or underarms may signal insulin resistance. Acanthosis nigricans occurs when high insulin levels stimulate skin cells to grow more rapidly.
Blood Sugar and Insulin Testing
Fasting insulin and glucose testing can help confirm the presence of insulin resistance.
Early detection allows individuals to make lifestyle changes before complications develop.
7. Fertility Challenges and PCOS
PCOS is one of the leading causes of ovulatory infertility or inability to get pregnant due to a lack of ovulation. Without regular ovulation to track, it becomes harder to predict fertile windows.
LH, FSH, and Progesterone Testing
Testing LH and FSH helps evaluate ovarian signaling. Measuring progesterone during the luteal phase can confirm whether ovulation occurred. Understanding these patterns empowers informed conversations with healthcare providers.
8. Mood Changes and Energy Fluctuations
Hormones affect more than reproductive health. Some people with PCOS experience anxiety, low mood, fatigue, and brain fog. Insulin resistance and chronic inflammation may also contribute to mood changes.
Thyroid and Nutrient Markers to Consider
Thyroid panel
Vitamin B12
Vitamin D
Iron markers
Identifying imbalances can help explain energy and mood changes.
When to Get Tested for PCOS Symptoms
If you notice multiple symptoms that have persisted for several months, consider testing. Most clinicians diagnose PCOS using the Rotterdam Criteria, when at least two of the following symptoms are present:
Irregular ovulation
Elevated androgens (clinical signs or blood test results)
Polycystic ovaries on ultrasound
Blood testing for PCOS plays a key role in confirming hormone patterns and ruling out other conditions. Comprehensive hormone and metabolic testing provides a data-driven view of your health. Instead of guessing, you can understand exactly what is happening inside your body.
Understanding PCOS Symptoms Is the First Step
If you're dealing with PCOS, you might notice changes in your skin, mood, weight, and cycles. These symptoms usually stem from hormone imbalances and insulin issues. The good news is that you can get clear answers through lab tests.
Getting your blood tested is one way to diagnose PCOS. It helps pinpoint if you have high androgens, insulin resistance, or thyroid problems that might be causing these issues. If you're experiencing ongoing PCOS symptoms, start with a thorough blood test.
Mito Health offers a Core Comprehensive Panel that checks over 100 biomarkers, including markers for PCOS, such as estradiol, SHBG, progesterone, and more. Become a member today and get access to advanced hormone panels and metabolic testing designed to provide clarity and actionable insights.
Frequently Asked Questions
What are the most common symptoms of PCOS?
Symptoms can vary from person to person. It includes irregular or missed periods, persistent acne, excess facial or body hair, scalp thinning, weight gain, and difficulty getting pregnant. Some people also experience darkened skin patches and mood changes.
Can you have PCOS symptoms even if your periods are regular?
Yes. Some people have regular periods but still experience other PCOS symptoms such as acne, excess hair growth, or insulin resistance. Diagnosis is based on a combination of symptoms, hormone levels, and, sometimes, ultrasound findings, not just on cycle patterns.
What blood tests help identify PCOS?
Common blood tests include total and free testosterone, DHEA-S, LH, FSH, fasting insulin, fasting glucose, HbA1c, thyroid markers, and lipid profile. These tests help assess hormone balance, ovulation patterns, and metabolic health.
Is insulin resistance always present in PCOS?
Not always, but it is very common. Many people with PCOS have some degree of insulin resistance, even if their blood sugar levels are still normal. Testing fasting insulin and glucose can help detect early metabolic changes.
When should I get tested for PCOS?
Consider testing if you have irregular periods, persistent acne, excess hair growth, unexplained weight gain, or fertility challenges lasting several months. A comprehensive hormone and metabolic panel can provide clarity and help guide next steps.
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One appointment, test at 2,000+ labs nationwide
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In-depth recommendations across exercise, nutrition, and supplements
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Meet with your dedicated care team to review your results and define next steps
Lifetime health record tracking
Upload past labs and monitor your progress over time
Biological age analysis
See how your body is aging and what’s driving it
Order add-on tests and scans anytime
Access to advanced diagnostics at discounted rates for members
Concierge-level care, made accessible.
Mito Health Membership
Codeveloped with experts at MIT & Stanford
Less than $1/ day
Billed annually - cancel anytime
Bundle options:
Individual
$399
$349
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or 4 payments of $87.25*
Duo Bundle
(For 2)
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Pricing for members in NY, NJ & RI may vary.
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