Understanding Your Female Hormone Panel: What Each Marker Means

A female hormone panel is one of the most informative diagnostic tools in women's health, yet most women receive their results with little explanation of what the numbers actually mean. Understanding each marker on your hormone panel — what it measures, what is normal, and what abnormalities suggest — can transform a confusing lab printout into actionable health intelligence.

Whether you are investigating irregular periods, fertility concerns, menopausal symptoms, or unexplained fatigue, your hormone panel tells a story about how your endocrine system is functioning. This guide walks through each major marker and explains what to look for.

Estradiol (E2)

Estradiol is the most potent and abundant form of estrogen in premenopausal women. It is produced primarily by the ovaries and plays critical roles in reproductive health, bone density, cardiovascular protection, brain function, and skin health.

Normal ranges vary by cycle phase: During the follicular phase (days 1–13), estradiol typically ranges from 30–120 pg/mL. It peaks at 100–400 pg/mL just before ovulation, then settles to 50–200 pg/mL during the luteal phase. In menopause, levels fall below 30 pg/mL.

Low estradiol can cause irregular or absent periods, hot flashes, vaginal dryness, bone loss, and mood changes. It may indicate premature ovarian insufficiency, hypothalamic amenorrhea, or menopause.

High estradiol may be associated with estrogen dominance, PCOS (in some cases), obesity (adipose tissue produces estrogen), or use of hormone-containing medications.

Progesterone

Progesterone is the "pregnancy hormone," produced mainly by the corpus luteum after ovulation. It prepares the uterine lining for implantation and supports early pregnancy. Outside of reproduction, progesterone has calming effects on the nervous system and supports sleep.

Testing timing matters: Progesterone should be tested during the mid-luteal phase (approximately day 21 of a 28-day cycle) to confirm ovulation. A level above 3 ng/mL suggests ovulation occurred; levels above 10 ng/mL indicate strong ovulatory function.

Low progesterone may cause luteal phase defects, difficulty maintaining pregnancy, PMS, anxiety, insomnia, and irregular bleeding. It can occur in anovulatory cycles, perimenopause, or high-stress states.

Follicle-Stimulating Hormone (FSH)

FSH is produced by the pituitary gland and stimulates the ovaries to develop follicles. It is a key marker of ovarian reserve — how the brain and ovaries are communicating.

Normal follicular phase FSH: 3–10 mIU/mL. Values above 10 mIU/mL on day 3 of the cycle may indicate diminished ovarian reserve. Values above 25 mIU/mL consistently suggest perimenopause, and levels above 40 mIU/mL are diagnostic of menopause.

Elevated FSH means the pituitary is working harder to stimulate the ovaries — often because the ovaries are producing fewer hormones in response. This is the hallmark of declining ovarian function.

Low FSH may indicate hypothalamic amenorrhea (the brain is not sending adequate signals to the ovaries), which can result from extreme exercise, very low body weight, or severe stress.

Luteinizing Hormone (LH)

LH works in partnership with FSH. It triggers ovulation and supports corpus luteum function. The LH surge — a sharp spike mid-cycle — is what ovulation predictor kits detect.

Normal follicular phase LH: 2–15 mIU/mL. A mid-cycle surge can reach 25–100 mIU/mL.

LH:FSH ratio: In women with PCOS, LH is often elevated relative to FSH, with a ratio of 2:1 or higher. While not diagnostic on its own, an elevated LH:FSH ratio combined with other findings (irregular periods, elevated androgens) supports a PCOS diagnosis.

Anti-Müllerian Hormone (AMH)

AMH is produced by the small follicles in the ovaries and provides the best single-test estimate of ovarian reserve. Unlike FSH and estradiol, AMH is relatively stable throughout the menstrual cycle and can be tested on any day.

Normal AMH: 1.0–3.5 ng/mL for women of reproductive age. Values below 1.0 ng/mL suggest diminished ovarian reserve. Values above 3.5 ng/mL may be seen in PCOS, where the ovaries contain many small follicles.

AMH declines with age and is particularly useful for fertility counseling and predicting response to ovarian stimulation during IVF or egg freezing.

Testosterone (Total and Free)

Yes, women produce testosterone too — primarily from the ovaries and adrenal glands. It plays an important role in libido, energy, mood, muscle mass, and bone health.

Normal total testosterone for women: 15–70 ng/dL. Free testosterone is a smaller fraction that is not bound to proteins and is biologically active.

Elevated testosterone in women may indicate PCOS, congenital adrenal hyperplasia, or androgen-secreting tumors (rare). Symptoms include acne, hirsutism (excess hair growth), scalp hair thinning, and irregular periods.

Low testosterone can contribute to fatigue, reduced libido, muscle weakness, and mood changes — particularly in perimenopause and menopause.

DHEA-S (Dehydroepiandrosterone Sulfate)

DHEA-S is an adrenal androgen that serves as a precursor for both testosterone and estrogen production. It provides a window into adrenal gland function.

Normal range: 35–430 mcg/dL for adult women, declining with age. Elevated DHEA-S may point to adrenal sources of excess androgen production, while very low levels may indicate adrenal insufficiency or chronic stress-related adrenal depletion.

Thyroid Hormones (TSH, Free T4, Free T3)

While not "sex hormones," thyroid markers are routinely included in women's hormone panels because thyroid dysfunction profoundly affects menstrual regularity, fertility, weight, energy, and mood.

TSH: 0.4–4.0 mIU/L is the standard range, though many reproductive endocrinologists prefer TSH below 2.5 mIU/L in women trying to conceive. Elevated TSH indicates hypothyroidism; suppressed TSH suggests hyperthyroidism.

Free T4 and Free T3 measure the active thyroid hormones circulating in the blood. Both should be within their respective normal ranges for optimal function.

Prolactin

Prolactin is a pituitary hormone best known for stimulating milk production. Outside of pregnancy and breastfeeding, elevated prolactin can suppress ovulation and cause irregular or absent periods.

Normal range: 2–29 ng/mL. Elevated levels may be caused by pituitary adenomas (prolactinomas), certain medications (particularly antipsychotics and some antidepressants), hypothyroidism, or chronic stress.

Putting It All Together

No single hormone marker tells the full story. The real value of a hormone panel lies in interpreting all the markers together, in the context of your symptoms, menstrual history, age, and health goals. A licensed provider with experience in hormone health can help you connect the dots and create a plan that addresses the root causes of your symptoms rather than just the numbers on a page.

This content is for informational purposes only and does not constitute medical advice. Consult a licensed healthcare provider before starting any treatment.