Understanding Your Reproductive Hormone Panel

Section Editors: Christopher McCudden Ph.D., DABCC, FADLM, FCACB and Kamran Mirza MD PhD
July 14, 2026

A reproductive hormone panel is a group of blood tests that measure the hormones that control the reproductive system. These hormones are made by the ovaries or testes and by the pituitary gland, a small gland at the base of the brain that acts as a control center. The tests are used to investigate a range of concerns, including irregular periods, difficulty becoming pregnant, symptoms of menopause, polycystic ovary syndrome (PCOS), low testosterone in men, and high levels of a hormone called prolactin. They are also used to monitor hormone levels during gender-affirming care. Because these hormones work together and rise and fall throughout the menstrual cycle, the results are interpreted as a pattern rather than one value at a time.

This article explains what a reproductive hormone panel measures, why the timing of the test matters, and what each hormone on your report means.

The reference range that applies to your result is the one printed on your laboratory report, not the typical ranges shown here. Reference ranges vary between laboratories based on the equipment used, the population tested, and individual factors such as age, sex, and pregnancy status. Reproductive hormone ranges also depend heavily on where a person is in the menstrual cycle. Always compare your result to the reference range printed on your own report, and discuss any abnormal result with your doctor.

What does a reproductive hormone panel measure?

A reproductive hormone panel measures hormones involved in reproduction and the glands that control them. The pituitary gland in the brain releases follicle-stimulating hormone (FSH) and luteinizing hormone (LH), which signal the ovaries or testes, and it also makes prolactin. In response, the ovaries make estradiol and progesterone, and the testes make testosterone. Two additional tests are often included: anti-Müllerian hormone (AMH), which reflects the number of eggs remaining in the ovaries, and sex hormone-binding globulin (SHBG), a protein that carries sex hormones in the blood. Because these hormones control one another through feedback signals, doctors look at several of them together to understand what is happening.

How is the test performed?

A reproductive hormone panel is measured on a sample of blood drawn from a vein. For several of these hormones, timing is important. In people who have menstrual cycles, FSH, LH, and estradiol are often measured in the first few days of the cycle (around days 2 to 4) when checking ovarian function, while progesterone is measured about a week after ovulation to confirm that ovulation occurred. Testosterone is usually measured in the morning, when levels are highest. AMH and prolactin can be measured at any time. It is important to tell the person ordering the test about any hormonal medications, including birth control or hormone therapy, because these change the results.

Common reproductive hormones and what they mean

Your report may include some or all of the hormones below, depending on what is being investigated.

Follicle-stimulating hormone (FSH)

FSH is made by the pituitary gland. In women, it stimulates the ovaries to grow follicles, each containing an egg. In men, it supports sperm production. A high FSH in a woman, especially early in the cycle, suggests the ovaries are responding less well, which happens naturally around menopause. FSH can swing widely during the years leading up to menopause (perimenopause), so a single value may not tell the whole story.

Luteinizing hormone (LH)

LH is also made by the pituitary gland. A mid-cycle surge in LH triggers the release of an egg (ovulation), and home ovulation predictor kits work by detecting this surge. In men, LH stimulates the testes to make testosterone. A pattern of higher LH compared with FSH can be one supporting sign of polycystic ovary syndrome (PCOS), although it is not enough to make the diagnosis on its own.

Estradiol (E2)

Estradiol is the main form of estrogen and is produced mostly by the ovaries. Its level rises and falls across the menstrual cycle, so the timing of the test matters. Estradiol is low after menopause. An elevated estradiol level early in the cycle can mask a high FSH and make ovarian function appear better than it is, which is one reason the two are measured together.

Progesterone

Progesterone is produced by the ovary after ovulation and prepares the lining of the uterus for a possible pregnancy. Measuring progesterone about a week before the expected period is a common way to confirm that ovulation has occurred. A low progesterone level at that point may indicate that ovulation did not happen during that cycle.

Testosterone and free testosterone

Testosterone is the main androgen. Most testosterone in the blood is bound to proteins, and only the unbound portion, called free testosterone, is active. Free testosterone is usually calculated from total testosterone and SHBG levels. In men, a low testosterone level can explain symptoms such as low energy, reduced sex drive, or erectile difficulties. In women, a raised testosterone or free testosterone level can be a sign of PCOS or another cause of androgen excess.

Sex hormone-binding globulin (SHBG)

SHBG is a protein made by the liver that binds sex hormones and controls how much is free and active. It is measured to help interpret testosterone levels, because low SHBG increases the amount of free testosterone even when total testosterone is normal. SHBG is lowered by conditions such as obesity and insulin resistance and raised by others, so it provides important context for the other hormone results.

Anti-Müllerian hormone (AMH)

AMH is made by small follicles in the ovaries, and its level reflects the number of eggs remaining, sometimes called the ovarian reserve. Because it is fairly steady across the cycle, it can be measured at any time. AMH is mainly used to help plan fertility treatment and to estimate how close a woman may be to menopause. It is important to understand what AMH does not do: it reflects the quantity of eggs, not their quality, and a low AMH does not mean a person cannot conceive naturally. Results also vary between laboratories, so AMH is best interpreted by a specialist alongside other information.

Prolactin

Prolactin is made by the pituitary gland and is best known for stimulating breast milk production. A high prolactin level can cause irregular or absent periods, difficulty becoming pregnant, breast milk production when not breastfeeding, and low sex drive. Causes include certain medications, an underactive thyroid, stress, and a benign pituitary tumor called a prolactinoma. Because prolactin can rise briefly with stress or a recent meal, a high result is often repeated before it is investigated further.

What can affect the results?

Many factors change reproductive hormone levels, which is why the results are always interpreted in context. The timing within the menstrual cycle strongly affects FSH, LH, estradiol, and progesterone. Hormonal birth control and hormone therapy alter many of these hormones and are important to mention before testing. Pregnancy changes hormone levels substantially. Significant stress, heavy exercise, and low body weight can suppress signals from the brain and lower FSH, LH, and estrogen levels. Thyroid disease can raise prolactin and disturb the menstrual cycle. The time of day matters for testosterone levels, and a recent illness or certain medications can also affect results. For AMH, differences between laboratory methods can affect the reported value, so results from different labs may not match exactly.

What happens after the test?

A reproductive hormone panel guides the next steps rather than providing a single answer, and the doctor reads the results together as a pattern. Because timing and everyday factors affect the values, a test is sometimes repeated at the correct point in the cycle or on a different day. Depending on the findings, additional tests may follow, such as thyroid tests, a repeat prolactin test, or an ultrasound of the ovaries. The doctor may also refer to a specialist, such as a fertility specialist (reproductive endocrinologist), a gynecologist, or an endocrinologist. What the results mean depends on the reason for testing, whether that is assessing ovulation and fertility, investigating PCOS, confirming menopause, evaluating low testosterone in men, or monitoring hormone levels during gender-affirming care. Your doctor interprets the entire panel, along with your symptoms and history, to decide what, if anything, is needed next.

Questions to ask your doctor

Which reproductive hormones were tested, and why were they ordered for me?
Was my blood drawn at the right point in my cycle for these tests?
What do my results suggest about ovulation, fertility, or menopause?
Could any medications, including birth control or hormone therapy, be affecting my results?
If I am being assessed for PCOS, what do my hormone levels show?
If my testosterone is low, what could be causing it, and should it be repeated?
What does my AMH result mean, and what does it not tell me?
Was my prolactin level normal, and does a high level require repeat testing or further investigation?
Do any of my results need to be rechecked at a different time?
Should I be referred to a specialist for further assessment?
If I am receiving gender-affirming care, are my hormone levels where they should be?