The female body produces over 50 distinct hormones, the same general count as males. The difference isn’t in the total number but in which hormones dominate, how they fluctuate, and what they do. Women share nearly every hormone with men, including testosterone, but produce certain ones in vastly different quantities and rely on a handful of reproductive hormones that drive the menstrual cycle, pregnancy, and menopause.
Why the Total Count Is the Same for Everyone
Scientists have identified more than 50 hormones in the human body. These are produced by a network of glands and organs: the pituitary, pineal, thymus, thyroid, adrenal glands, and pancreas all release hormones regardless of sex. The key difference is that women produce hormones in their ovaries while men produce them in their testes. So the question isn’t really how many hormones women have, but which ones matter most and how they behave differently in the female body.
The Four Hormones That Drive the Menstrual Cycle
Four major hormones regulate the menstrual cycle: follicle-stimulating hormone (FSH), luteinizing hormone (LH), estrogen, and progesterone. These four don’t work independently. They operate through a tightly coordinated feedback loop between the brain and the ovaries called the hypothalamic-pituitary-ovarian axis. The balance of this system requires precise timing: the ovaries release sex hormones that signal the brain to increase or decrease production of other hormones, keeping the whole cycle on track.
FSH and LH are released from the pituitary gland in the brain and travel through the bloodstream to the ovaries, where they stimulate the growth of about 15 to 20 eggs, each inside its own follicle. These two hormones also trigger rising estrogen production. As estrogen climbs, it switches off FSH like a thermostat, limiting how many follicles continue developing. Then, when estrogen from the dominant follicle hits a peak, it triggers a surge of LH that causes ovulation.
After the egg is released, the empty follicle transforms into a structure called the corpus luteum, which secretes both estrogen and progesterone. Progesterone’s main job at this point is preparing the uterine lining to receive a fertilized egg. If pregnancy doesn’t happen, the corpus luteum breaks down, hormone levels drop, and menstruation begins.
Estrogen levels shift dramatically across the cycle. During the follicular phase (the first half), estradiol, the primary form of estrogen, typically ranges from 20 to 350 pg/mL. At the midcycle peak around ovulation, it can reach 150 to 750 pg/mL before settling back to 30 to 450 pg/mL during the luteal phase.
Testosterone and Other Androgens
Women produce testosterone and DHEA (dehydroepiandrosterone), two hormones most people associate with men. These androgens play surprisingly broad roles in the female body: they influence mood, cognition, sexual desire, sleep, bone strength, muscle function, and blood vessel health. Testosterone at normal female levels helps blood vessels relax by boosting nitric oxide production. It also reduces oxidative stress in the brain and speeds nerve regeneration.
In the vagina specifically, androgens regulate moisture production, improve blood flow, and influence nerve density. There are androgen receptors throughout the central nervous system, affecting everything from body temperature regulation to language and visual-spatial skills.
Despite their importance, there’s no agreed-upon testosterone level that defines “deficiency” in women. The Endocrine Society actually recommends against diagnosing “female androgen deficiency” because current lab tests aren’t reliable enough to draw clear lines between normal and low levels. DHEA-S, measured through a blood test, is considered the most dependable marker of adrenal androgen production, but interpreting what the numbers mean for an individual woman remains complex.
Hormones Unique to Pregnancy
Pregnancy introduces hormones that don’t exist in the body at any other time. Human chorionic gonadotropin (hCG) is produced almost exclusively by the placenta and is the hormone that pregnancy tests detect. Its levels rise sharply during the first trimester, and it’s thought to play a role in the nausea and vomiting many women experience early in pregnancy.
Human placental lactogen (hPL) is another pregnancy-only hormone made by the placenta. It helps provide nutrition to the developing fetus and stimulates the milk glands in preparation for breastfeeding.
Relaxin, produced by the ovaries during the second half of every menstrual cycle, takes on a much larger role during pregnancy. If conception occurs, the placenta also begins secreting it. Relaxin loosens muscles, joints, and ligaments to help the body stretch as the baby grows. It prevents premature contractions, helps the placenta develop, relaxes blood vessels to accommodate increased blood volume, and eventually softens and expands the cervix before delivery. Research also suggests relaxin may help reduce scarring in organs like the heart and lungs and promote the growth of new blood vessels.
What Happens at Menopause
Menopause doesn’t eliminate hormones. It reorganizes them. The ovaries gradually stop releasing eggs, which means the cyclical production of estrogen and progesterone winds down. FSH levels rise because the brain keeps sending signals to the ovaries, but the ovaries no longer respond the way they used to. An FSH level above 30 mIU/mL, combined with 12 months without a period, is generally considered diagnostic of menopause.
The adrenal glands continue producing small amounts of estrogen and androgens after menopause, so these hormones don’t disappear entirely. But the dramatic drop in ovarian estrogen is what drives the hallmark symptoms: hot flashes, changes in bone density, vaginal dryness, and shifts in mood and cognition. The total number of hormones in the body stays the same. What changes is the quantity and the rhythm.