Firefighting is tough—physically, mentally, and emotionally. But a new study suggests the stress may go deeper than expected. Women firefighters with PTSD and anxiety showed significantly lower levels of anti-Müllerian hormone (AMH), a fundamental marker of ovarian reserve.

Stress and fertility aren’t often linked, but this research raises a critical question: Can chronic stress impact reproductive health? And if so, what can be done to protect it?

What Did the Study Reveal About PTSD, Anxiety, and AMH Levels?

PTSD and anxiety are known for their effects on mental health. New research shows they may also impact hormone levels and fertility. A recent study looked at how these conditions relate to anti-Müllerian hormone (AMH), a key marker of ovarian reserve.

Results suggest that chronic stress could speed up reproductive aging. Lower AMH levels may make it harder to conceive or shorten the window for fertility. Mental health and reproductive health are more connected than many realize.

What Did the Study Find?

Researchers studied 372 women firefighters to see how PTSD, anxiety, and depression might affect their reproductive health. Each participant reported any past diagnoses of these conditions, and doctors measured their anti-Müllerian hormone (AMH) levels through blood tests.

Key Takeaways:

• PTSD was linked to a 66% drop in AMH levels. Women with PTSD had a much lower egg supply than those without the condition.
• Anxiety was tied to a 33% decrease in AMH. However, when PTSD cases were removed, anxiety alone didn’t show a strong connection.
• Depression had no clear effect on AMH levels. Unlike PTSD and anxiety, it didn’t seem to impact ovarian reserve.

Chronic stress from PTSD and anxiety may cause the body to age faster, including the reproductive system. Studies suggest that high stress levels could lower ovarian reserve and affect fertility. Researchers are still working to understand the exact connection. What’s clear is that mental health and reproductive health are more closely linked than many realize.

How Do PTSD and Anxiety Affect AMH Levels?

The body relies on hormones to manage stress, but long-term stress can throw this system off balance. PTSD and anxiety keep the body in a constant state of high alert, which may impact reproductive health.

• High Cortisol Levels: Chronic stress raises cortisol, the body’s main stress hormone. Too much cortisol can interfere with the ovaries, disrupt menstrual cycles, and lower AMH levels.
• Reproductive System Disruption: The HPO axis controls hormones like estrogen and progesterone. When stress overwhelms this system, ovarian function may slow down or decline earlier than expected.
• Increased Inflammation: PTSD and anxiety are linked to higher inflammation in the body. This can speed up ovarian aging and reduce egg supply.

Mental health conditions may also influence fertility and reproductive health over time.

Why Are Women Firefighters at Higher Risk?

Firefighting is one of the most demanding jobs—physically, mentally, and emotionally. Women in this profession face extreme stress, trauma, and sleep disruptions, all of which can impact reproductive health. The study’s findings suggest a strong link between PTSD, anxiety, and lower AMH levels, likely due to the unique challenges of this career.

• Repeated Trauma Exposure: Constant exposure to life-threatening emergencies, fires, and injuries increases the risk of PTSD.
• Disrupted Sleep from Shift Work: Irregular schedules interfere with sleep, which is important in hormone regulation and reproductive health. Poor sleep has been linked to lower AMH levels and menstrual irregularities.
• Workplace Stress: Women firefighters often face gender-related pressures, bias, and the need to prove themselves in a male-dominated field. This added stress may contribute to more increased anxiety levels.

The combination of chronic stress, poor sleep, and physical strain creates a perfect storm for hormonal imbalances. Women in this field are more vulnerable to reproductive health issues.

What Are the Limitations of the Study?

Some limitations should be considered before drawing conclusions.

First, mental health conditions and other factors relied on self-reported surveys, which aren’t always accurate. Questions were taken from a trusted CDC survey. Diagnoses, however, were not verified by a doctor.

Medication use wasn’t considered, so its effect on ovarian health is unknown. The study was also cross-sectional. Meaning, it can’t show whether mental health issues affect ovarian reserve or the other way around.

Results may not apply to the general public since firefighters have different lifestyles, including lower smoking rates and more physical activity. However, even after removing smokers from the data, results stayed the same. Over time, female firefighters face more workplace exposures, which could affect ovarian health. 

Lastly, the study was conducted during the COVID-19 pandemic, a time that brought widespread stress and uncertainty. Mental health conditions in this group may have been affected as a result.

What Do These Findings Mean for Women’s Health?

Women with PTSD or anxiety should consider checking their fertility sooner. Planning ahead can make it easier to understand reproductive health. Managing stress and scheduling regular checkups may help protect fertility.

• Consider AMH Testing Early: Checking AMH levels can give insight into egg supply and help with future family planning.
• Manage Stress for Better Hormone Balance: Practices like therapy, meditation, and lifestyle changes may help keep stress hormones from disrupting fertility.
• Workplace Mental Health Support Matters: Jobs with high stress and trauma exposure should offer programs to help employees manage PTSD and anxiety.

Being proactive about mental and reproductive health can make a difference in long-term well-being.

What Is Anti-Müllerian Hormone (AMH) and Why Does It Matter?

Anti-Müllerian hormone (AMH) is a key indicator of a woman’s ovarian reserve—the number of eggs she has left. It is produced by small follicles in the ovaries and is used to estimate reproductive potential.

AMH levels stay consistent throughout the menstrual cycle, unlike other fertility hormones. It is a reliable way to check ovarian function and egg supply.

Why Is AMH Important?

AMH levels give important clues about fertility, menopause, and overall reproductive health. Doctors and fertility specialists use AMH tests to help guide decisions about family planning and medical treatments.

• Egg Supply Check: High AMH means more eggs. Low AMH suggests fewer eggs remain.
• Fertility Treatment Planning: Women going through IVF or egg freezing need a good egg supply. AMH helps doctors decide the best treatment approach.
• Menopause Prediction: Lower AMH levels can signal an earlier menopause. Research shows AMH can predict menopause within four years.
• Detecting Ovarian Disorders: High AMH is common in PCOS, while very low AMH may point to early ovarian failure.

How Are AMH Levels Checked?

A simple blood test measures AMH levels. Unlike other fertility hormones, AMH stays steady throughout the menstrual cycle, so testing can be done anytime.

Levels naturally decline with age. Women in their 20s and early 30s tend to have higher levels, while levels drop as they get older.

Average AMH Levels by Age (ng/mL):

• 25 years old → ~3.0
• 30 years old → ~2.5
• 35 years old → ~1.5
• 40 years old → ~1.0
• 45 years old → ~0.5

An AMH level below 1.0 may suggest fewer remaining eggs. Levels above 4.0 could be linked to PCOS (polycystic ovary syndrome).

What Factors Influence AMH Levels?

Several things can impact AMH levels besides age:

• Family history – Egg supply is mostly genetic. If close female relatives had early menopause, AMH levels may be lower.
• Smoking – Harms the ovaries and speeds up egg loss, leading to lower AMH.
• Cancer treatments – Chemotherapy and radiation can damage the ovaries and cause a sharp drop in AMH.
• Weight – Some research links higher body weight to lower AMH levels.
• Chronic stress & mental health – Studies suggest PTSD and anxiety may lower AMH, especially in high-stress jobs like firefighting.

Can Stress-Induced Hormonal Imbalances Affect Fertility?

Yes. Chronic stress, especially from PTSD and anxiety, can disrupt the body’s hormonal balance and impact fertility. The endocrine system—which controls hormone production—responds to stress by releasing cortisol and adrenaline.

These hormones are essential for survival. When elevated for too long, they interfere with reproductive hormones like estrogen, progesterone, and anti-Müllerian hormone (AMH).

How Does Stress Affect Reproductive Hormones?

The body reacts to stress by releasing hormones that help it cope, but when stress becomes constant, it can throw off the balance of reproductive hormones.

This happens because stress affects the hormone control system, which includes the brain, ovaries, and adrenal glands. When that system is overwhelmed, fertility may suffer.

• Too Much Cortisol: Long-term stress leads to high cortisol levels, which can disrupt ovulation, lower progesterone, and shorten menstrual cycles.
• Ovarian Function Disruption: The HPO axis can stop working properly under stress. This may cause irregular periods, missed ovulation, or temporary infertility.
• Lower AMH Levels: Studies show that PTSD and anxiety are linked to a drop in AMH. Lower AMH may make conception harder.
• Higher Prolactin Levels: Chronic stress can raise prolactin, a hormone that interferes with ovulation and menstrual cycles. High prolactin is linked to fertility problems.

When stress hormones stay out of balance for too long, it can make it harder to get pregnant and may even speed up reproductive aging.

Does Stress Also Affect Egg Quality?

Yes. Chronic stress is linked to higher oxidative stress levels, which can damage eggs at a cellular level. Oxidative stress occurs when there is an imbalance between free radicals and antioxidants in the body. This can:

• Increase DNA damage in eggs – Poor egg quality reduces fertilization success.
• Disrupt embryo implantation – A stressed body may not create the optimal environment for pregnancy.
• Raise miscarriage risk – Elevated stress hormones have been linked to a higher risk of early pregnancy loss.

Fertility specialists often emphasize stress management strategies as part of treatment because reducing stress can improve hormonal balance and egg health.

How Can Women Protect Their Reproductive Health While Managing PTSD and Anxiety?

Managing PTSD and anxiety while protecting fertility requires a holistic approach that supports mental, hormonal, and reproductive health.

1. Seek Professional Mental Health Support

• Cognitive-Behavioral Therapy (CBT): Proven to reduce symptoms of PTSD and anxiety by retraining thought patterns.
• Transcranial Magnetic Stimulation (TMS): A medication-free therapy that improves mood regulation by targeting underactive brain regions linked to anxiety and PTSD.
• Medication (If Necessary): Some antidepressants are safe for reproductive health, but it’s important to consult a doctor about fertility-friendly options.

2. Support Hormonal Balance Through Diet

What you eat directly affects hormone production. A fertility-friendly diet can help stabilize reproductive hormones.

• Healthy Fats – Omega-3s from salmon, walnuts, and flaxseeds support hormone balance.
• Protein-Rich Foods – Lean meats, eggs, and legumes help regulate insulin and cortisol levels.
• Antioxidant-Rich Fruits & Vegetables – Berries, spinach, and bell peppers fight oxidative stress and improve egg quality.
• Limit Processed Foods – Excess sugar and trans fats can worsen inflammation and hormone imbalances.

3. Prioritize Sleep for Hormone Regulation

Poor sleep increases cortisol and disrupts estrogen and progesterone levels. Women with PTSD and anxiety often struggle with sleep, so optimizing sleep hygiene is critical.

• Set a Sleep Schedule: Go to bed and wake up at the same time every day.
• Limit Blue Light Exposure: Avoid screens before bed to support melatonin production.
• Practice Relaxation Techniques: Meditation, deep breathing, or journaling before bed can reduce stress.

4. Exercise—But Not Too Much

Moderate exercise supports hormone balance and mental health, but excessive exercise can disrupt ovulation.

• Best Choices: Yoga, walking, swimming, and strength training.
• What to Avoid: Over-exercising, especially high-intensity workouts, which can spike cortisol and disrupt cycles.

5. Consider Regular Fertility Testing

For women with PTSD and anxiety, regular fertility checkups can provide early insights into ovarian health.

• AMH Testing: Measures ovarian reserve.
• Hormone Panels: Checks for irregularities in estrogen, progesterone, and thyroid levels.
• Ultrasounds: Monitors ovarian function and follicle count.

Being proactive about reproductive health allows women to make informed decisions about fertility preservation, egg freezing, or family planning.

Need Expert Help Managing PTSD and Anxiety? Contact the TMS Institute of Arizona

Your mental health and fertility are connected, and both deserve the best care. The TMS Institute of Arizona delivers advanced, non-invasive treatments like Transcranial Magnetic Stimulation (TMS) to help manage PTSD and anxiety without medication.

• Backed by Science: TMS is FDA-approved and proven to work.
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Your health and future matter.  Contact us. Let us help you feel your best.

 References

Valenti, M. A., Farland, L. V., Huang, K., Liu, Y., Beitel, S. C., Jahnke, S. A., Hollerbach, B., St, C. C., Gulotta, J. J., Kolar, J. J., Urwin, D. J., Louzado-Feliciano, P., Baker, J. B., Jack, K. L., Caban-Martinez, A. J., Goodrich, J. M., & Burgess, J. L. (2024). Evaluating the Effect of Depression, Anxiety, and Post-Traumatic Stress Disorder on Anti-Müllerian Hormone Levels Among Women Firefighters. Journal of Women S Health. https://doi.org/10.1089/jwh.2024.0534

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