What is Progesterone?
Progesterone is produced by the ovaries after ovulation and is essential for regulating your menstrual cycle. During pregnancy, rising progesterone levels prepare the uterine lining for egg implantation.
Progesterone also acts directly in the brain through its metabolite, allopregnanolone, which interacts with GABA receptors to promote relaxation and sleep.
Why Does Progesterone Matter?
- Supports implantation and embryo development by thickening the uterine lining for fertilization
- Maintains a healthy pregnancy
- Regulates mood, promoting calm and reducing anxiety and irritability through GABA signaling in the brain
- May support bone health by stimulating bone formation and reducing bone loss (though estrogen plays the dominant role)
- Helps regulate menstrual cycles and confirms ovulation
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How to Interpret Progesterone
Progesterone levels fluctuate during the menstrual cycle and during different life stages:
- Follicular phase: Before ovulation, progesterone levels are low
- Luteal phase: After ovulation, progesterone levels rise to prepare the uterine lining for implantation
- Pregnancy: Progesterone remains elevated to support the uterine environment until the placenta takes over hormone production
- Perimenopause: Ovulation becomes less consistent, leading to lower or highly variable progesterone levels
- Menopause: Without ovulation, progesterone levels remain persistently low unless hormone therapy is used
Physicians usually measure progesterone about one week after ovulation, often around day 21 of a typical 28-day cycle. If cycles are irregular, clinicians interpret progesterone alongside other hormones such as estradiol and follicle-stimulating hormone (FSH), as well as symptoms and cycle history.
(Ranges may vary slightly by lab)
Standard reference ranges represent the middle 95% of healthy individuals but don’t necessarily reflect levels associated with longevity. Optimal ranges are derived from clinical guidelines, peer-reviewed research, and real-world outcomes data, with an emphasis on levels associated with peak functioning and reduced disease risk.
Benefits of Optimizing Progesterone
Balancing progesterone levels can offer several benefits:
- Maintain regular menstrual cycles
- Reduced PMS and perimenopause symptoms
- Improved sleep quality
- Improved memory and reduced brain fog
- Strong bones and reduced risk for osteoporosis
- Supports reproductive health and fertility
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Low Progesterone Levels
Low progesterone may simply reflect the normal phase of the menstrual cycle. If progesterone remains low after ovulation, women may notice shortened menstrual cycles or increased premenstrual mood changes. This is commonly seen with anovulatory cycles, chronic stress, or perimenopause.
Symptoms:
- Irregular, heavy, or missed periods
- Intensified PMS and mood swings
- Unexpected weight gain
- Breast tenderness
- Headaches
- Low libido
- Sleep disturbances
Causes:
- Anovulation (not releasing an egg)
- Polycystic ovary syndrome (PCOS)
- Perimenopause
- Chronic stress
- Thyroid dysfunction
- Extreme dieting or excessive exercise
Healthspan Impacts:
- Reduced sleep quality, increased sleep disturbances, and insomnia
- Lower stress resilience and increased anxiety and depression
- Increased risk of infertility and miscarriage1
High Progesterone Levels
High progesterone levels are most commonly seen after ovulation during the luteal phase of the menstrual cycle or during pregnancy. Outside of these situations, elevated levels are uncommon but may occasionally be associated with ovarian cysts or certain adrenal conditions.
Symptoms:
- Fatigue and drowsiness
- Breast tenderness
- Weight gain
- Decreased libido
- Mood swings
- Bloating
Causes:
- Hormone contraceptives or hormone replacement therapy
- Pregnancy
- Ovarian cysts
- Congenital adrenal hyperplasia (a rare inherited disorder)
Healthspan Impacts:
- Fragmented sleep2
- Increased risk of insulin resistance during pregnancy3
How Hone Treats Out of Range Progesterone
Your Hone physician will evaluate your progesterone levels as part of a full hormone panel including estradiol and Follicle-Stimulating Hormone (FSH), alongside your symptoms, and overall health. From there, they can determine a treatment plan addresses any underlying issues or supports optimal hormone balance.
Bataa, M., Abdelmessih, E., & Hanna, F. (2024). Exploring Progesterone Deficiency in First-Trimester Miscarriage and the Impact of Hormone Therapy on Foetal Development: A Scoping Review. Children.
↑Sharkey, K.M., et al. (2014). Objective Sleep Interruption and Reproductive Hormone Dynamics in the Menstrual Cycle. Sleep Medicine.
↑Wada, T., et al. (2010). Progesterone inhibits glucose uptake by affecting diverse steps of insulin signaling in 3T3-L1 adipocytes. Am J Physiol Endocrinol Metab.
↑Henmi, H., et al. (2003). Effects of ascorbic acid supplementation on serum progesterone levels in patients with a luteal phase defect. Fertility and sterility.
↑Kadir, M., et al. (2022). Folate intake and ovarian reserve among women attending a fertility center. Fertility and Sterility.
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Reviewed for Accuracy by Our Medical Review Board
This biomarker information has been reviewed by a member of Hone’s medical review board. As part of the medical review team, physicians fact-check this content against the latest research and their own experience treating their patients.
Ashley Winter, M.D., is a board-certified urogynecologist trained at Weill Cornell and Cleveland Clinic. She specializes in female and male sexual dysfunction, urinary issues, genital pain, and hormone therapy.
James Staheli, D.O., is the Medical Director for Broad Health, Hone Health’s affiliated medical practice and a family medicine doctor in Atlanta, Georgia.
