Both sexes produce the same core set of hormones, so the question is really about concentrations, not about one sex having access to molecules the other lacks. When you tally individual hormones, some run higher in females (growth hormone, leptin, oxytocin, thyroid-stimulating hormone), some run higher in males (testosterone, cortisol responses to certain stressors), and many shift dramatically depending on age, time of day, or reproductive state. The framing of “more hormones” collapses a complicated, constantly shifting landscape into a scorecard that doesn’t quite work.
Every Hormone Exists in Both Sexes
All steroid hormones, whether people think of them as “male” or “female,” trace back to the same starting material: cholesterol. Inside certain cells, cholesterol gets shuttled to the inner membrane of mitochondria, where an enzyme converts it into pregnenolone, the shared precursor for every steroid the body makes, including testosterone, estradiol, progesterone, and cortisol.1PubMed Central. Cellular cholesterol delivery, intracellular processing and utilization for biosynthesis of steroid hormones From that single starting point, different tissues branch the pathway toward different end products. Ovaries favor estradiol and progesterone. Testes favor testosterone. Adrenal glands in both sexes make cortisol and smaller amounts of androgens. But every one of these hormones circulates in measurable quantities in both men and women.
This shared biochemistry means the real story is about ratios and tissue-specific production, not about exclusive ownership. Testosterone is typically called a “male hormone,” yet it is the most abundant circulating androgen in women too, and its levels influence sexual desire, arousal, bone health, and general well-being in females.2PubMed Central. Is testosterone involved in low female sexual desire? Estradiol is typically called a “female hormone,” yet in men it circulates at concentrations that exceed those found in postmenopausal women, and estrogen receptors are expressed across a wide range of male tissues, from the brain to the skeleton to the cardiovascular system.3European Journal of Endocrinology. Estradiol as a male hormone
Estrogen’s Surprising Importance in Men
One of the most persistent misconceptions is that estrogen is essentially a women’s hormone that men carry only in trace amounts. Research over the past few decades has overturned that picture. In the male reproductive tract, estrogen receptor concentrations are actually higher than in many other organs.4PubMed. Estrogens and health in males The enzyme aromatase, which converts androgens into estrogens, is expressed in Leydig cells, the seminiferous epithelium, and multiple non-reproductive tissues in men.5PubMed Central. Estrogens in Male Physiology Inside the rete testis fluid, estradiol reaches concentrations normally found only in females.
What does all that estrogen do? Quite a lot. In men, estradiol helps regulate the hypothalamic-pituitary-testicular axis (the feedback loop that controls testosterone production itself), supports bone growth and maintenance, influences body composition and glucose metabolism, and contributes to vasomotor stability.3European Journal of Endocrinology. Estradiol as a male hormone Men who carry mutations that knock out their estrogen receptor or aromatase enzyme develop thin bones, keep growing taller than expected because their growth plates never close properly, and often need estrogen treatment to correct these problems.4PubMed. Estrogens and health in males Brain structure and certain behavioral sex differences actually depend on the local conversion of testosterone into estradiol within the brain itself, rather than on testosterone acting alone.
When researchers have looked at estrogen signaling across rat tissues, most organs showed no significant sex difference in estrogen receptor expression. The exceptions were in the kidneys and the gonads, where specific receptor subtypes diverged sharply between males and females.6PubMed Central. Estrogen receptor profiles across tissues from male and female Rattus norvegicus The broader point is that estrogen signaling is pervasive in both sexes, and framing estrogen as exclusively female obscures its essential roles in men.
Testosterone in Women
The flip side is just as important. Testosterone in women is produced by the ovaries and adrenal glands, and its levels decline gradually with age, dropping by roughly half between the ages of 20 and 40.2PubMed Central. Is testosterone involved in low female sexual desire? Despite this decline, testosterone remains crucial for sexual function, bone density, and overall well-being. The challenge is that current hormone assays struggle to reliably measure testosterone at the lower concentrations typical in women, which has made it difficult to establish clear diagnostic thresholds for when a woman’s levels are “too low.”
This measurement problem is more than academic. Standard immunoassay techniques tend to inflate female testosterone readings far more than male ones. In one study of adolescents, a common clinical lab method overestimated female testosterone by nearly 18-fold relative to the more accurate technique of liquid chromatography-mass spectrometry, compared with about a 3-fold overestimation in males.7Comprehensive Psychoneuroendocrinology. Chemiluminescent immunoassay overestimates hormone concentrations and obscures testosterone sex differences relative to LC-MS/MS in a field study of diverse adolescents That kind of distortion can make sex differences in testosterone look smaller than they really are, or make individual women’s results unreliable for clinical decisions. Newer mass-spectrometry-based methods are considered more accurate for measuring sex steroids in both sexes, though they come with their own technical challenges.8PubMed. Comparing immunoassay and mass spectrometry techniques for salivary sex hormone analysis
Hormones Where Women Clearly Have Higher Levels
If you step away from the classic sex steroids, several important hormones consistently run higher in women. Growth hormone is one of the clearest examples. Premenopausal women have roughly three times the mean 24-hour growth hormone concentration of men, driven by larger and longer secretory bursts rather than more frequent ones.9PubMed. An amplitude-specific divergence in the pulsatile mode of growth hormone (GH) secretion underlies the gender difference in mean GH concentrations in men and premenopausal women At rest, women secrete about 3.7 times as much growth hormone per burst as men.10PubMed. Effects of gender on exercise-induced growth hormone release This sex difference appears to be tied to estradiol levels, since growth hormone secretion rises during the preovulatory phase of the menstrual cycle when estradiol peaks.11PubMed. Neuroendocrine control of pulsatile growth hormone release in the human: relationship with gender
Leptin and adiponectin, two hormones produced by fat tissue that help regulate metabolism and appetite, are also higher in women. In a large population study, women had median leptin levels nearly three times those of men and median adiponectin levels about 70 percent higher.12PubMed. Sex differences in body fat distribution are related to sex differences in serum leptin and adiponectin The leptin difference largely disappears when you account for the fact that women carry a higher percentage of total body fat. The adiponectin gap, on the other hand, persists even after adjusting for visceral fat, suggesting something beyond body composition is driving it.13PubMed. Distribution of plasma levels of adiponectin and leptin in an adult Caucasian population
Oxytocin, sometimes called the “bonding hormone,” also tends to be higher in women’s blood, while vasopressin (a related hormone involved in water balance and social behavior) tends to be higher in older adults of both sexes.14PubMed Central. Plasma oxytocin and vasopressin levels in young and older men and women: Functional relationships with attachment and cognition
Thyroid Hormones and the Autoimmune Connection
Thyroid hormone levels are broadly similar between the sexes, but the details reveal meaningful differences. Large population studies show that women tend to have slightly higher circulating T3 and higher basal TSH levels for a given amount of free T4, reflecting what researchers call sex-specific set points of the thyroid feedback axis.15Journal of Endocrinology. Sex differences in thyroid function: from central regulation to hormone metabolism and disease susceptibility These differences are subtle enough that standard reference ranges usually don’t separate by sex, but they have consequences: women are considerably more likely to develop subclinical and overt hypothyroidism.
Part of this vulnerability comes from the immune system. In a large population-based study, thyroid antibody positivity (a marker of autoimmune thyroid disease) was found in about 23 percent of women versus 10 percent of men. Subclinical hypothyroidism affected roughly 4.5 percent of women and 2 percent of men, while overt hypothyroidism hit about 3.2 percent of women and 1.1 percent of men.16PubMed. Male gender differences in the thyroid ultrasound features, thyroid peroxidase antibodies and thyroid hormone levels The connection between sex hormones and autoimmune disease extends well beyond the thyroid. Estrogens tend to boost humoral immunity (the arm of the immune system that produces antibodies), while androgens and progesterone tend to dampen it.17PubMed Central. Gender-Specific Impact of Sex Hormones on the Immune System This helps explain why autoimmune diseases in general are far more common in women.
Stress Hormones Are Not What You’d Expect
Popular culture sometimes assumes women are “more hormonal” under stress, but the cortisol data tells a more nuanced story. When men and women are put through a standardized psychological stress test in a lab, men typically show a larger cortisol spike.18PubMed Central. Sex and stress: Men and women show different cortisol responses to psychological stress induced by the Trier Social Stress Test and the Iowa Singing Social Stress Test The same pattern holds for ACTH, the pituitary hormone that triggers cortisol release: men showed significantly greater ACTH and cortisol responses to a social stress challenge than women did.19PubMed. Gender differences in hypothalamic-pituitary-adrenal (HPA) axis reactivity
But the picture flips with a different kind of stressor. When the same researchers used a pharmacological challenge (naloxone, which blocks opioid receptors), women’s cortisol responses were significantly greater than men’s.19PubMed. Gender differences in hypothalamic-pituitary-adrenal (HPA) axis reactivity The takeaway is that the stress hormone system doesn’t simply run “higher” in one sex. The type of stressor, the phase of the menstrual cycle, and other contextual factors all shape who produces more cortisol in any given situation.
Pregnancy as a Hormonal Extreme
If there’s one situation where the answer to “who has more hormones?” becomes unambiguous, it’s pregnancy. The placenta acts as a temporary endocrine organ, producing massive quantities of progesterone, estrogen, human chorionic gonadotropin, and other hormones that dwarf anything either sex experiences under normal circumstances.20PubMed Central. Hormones in pregnancy Progesterone alone rises so high during pregnancy that it reshapes the immune system, shifting it toward tolerance of the fetus by suppressing certain inflammatory pathways. These extreme hormonal states are temporary but physiologically transformative, affecting everything from blood volume to joint laxity to mood regulation.
Pregnancy is worth mentioning because it illustrates how misleading it is to compare “male” and “female” hormone levels as though each sex has a fixed, stable profile. A woman’s hormonal landscape at 25 weeks of pregnancy, during menstruation, at menopause, and while using hormonal contraception could each be described as a different endocrine environment entirely.
How Hormone Levels Change With Age
Both sexes experience hormonal decline with age, but the trajectories differ. Women go through menopause, a relatively abrupt drop in estrogen and progesterone production. Men experience a more gradual decline in testosterone starting around age 40, sometimes called andropause, though that term is debated because the decline is slower and less universal than menopause.21PubMed Central. Male Andropause: A Myth or Reality
These age-related changes alter the hormonal comparison between the sexes. The FSH-LH dynamics studied in different age groups show that younger women have a distinctly more irregular pattern of FSH release compared with LH, but this difference vanishes after menopause. Men show a similar erosion of that pattern with age, consistent with a gradual loss of coordination within the reproductive hormone axis.22PubMed. Effects of age on the irregularity of LH and FSH serum concentrations in women and men Hormonal comparisons between the sexes that don’t specify age are, at best, incomplete.
Daily Fluctuations and Brain Effects
Hormone levels don’t just vary across a lifetime or a menstrual cycle; they fluctuate within a single day. A densely sampled study tracking daily steroid hormone levels in a male and a female participant found that both testosterone and estradiol fluctuations influenced brain connectivity patterns in both sexes. Estradiol was associated with increased brain coherence in nearly all measured networks for both participants. The magnitude of the relationship between hormone fluctuations and brain connectivity was actually more pronounced in the male participant.23PubMed Central. Diurnal Fluctuations in Steroid Hormones Tied to Variation in Intrinsic Functional Connectivity in a Densely Sampled Male That finding challenges the assumption that hormonal effects on the brain are mostly a menstrual-cycle phenomenon in women. Both sexes ride daily hormonal waves, and those waves affect brain function in both.
What Hormone Therapy Reveals About Shared Biology
Transgender individuals who undergo hormone therapy provide a useful natural experiment for understanding how the same body responds to different dominant hormone profiles. When transgender men begin testosterone therapy, their creatinine levels (a marker related to muscle mass and kidney function) rise over the first several months and then stabilize at levels within the normal range for cisgender men.24The Journal of Applied Laboratory Medicine. Dynamic Impact of Hormone Therapy on Laboratory Values in Transgender Patients over Time This kind of shift shows how directly hormonal concentrations shape physiology: change the dominant hormone, and the body’s baseline metrics follow. It also underscores that the differences between male and female hormone profiles are quantitative, not categorical. The receptors, enzymes, and feedback loops are the same machinery in everyone; what differs is how much of each signal the machinery receives.
Why “More Hormones” Is the Wrong Frame
If you tried to score this as a contest, you’d find that women have higher levels of growth hormone, leptin, adiponectin, oxytocin, and TSH, while men have higher testosterone and often larger acute cortisol spikes under social stress. Estrogen is higher in premenopausal women than in men, but men still carry enough of it to regulate bone density, brain function, and fertility. Pregnancy sends several hormones into a range neither sex approaches otherwise. Age narrows many of these gaps from both directions.
The more interesting question is how those different concentrations interact with tissue-specific receptor expression, binding proteins, and enzyme activity to produce distinct physiological outcomes. A kidney cell in a female rat, for instance, expresses about 2.5 times more of one estrogen receptor subtype than the same cell in a male rat, while expressing about 80 percent less of another subtype.25PubMed. Effect of sex hormones on renal estrogen and angiotensin type 1 receptors in female and male rats So even when two bodies are bathed in the same hormone at the same concentration, the downstream effect can differ because the receiving tissue is wired differently. Hormones are only half the conversation; the other half is what the target cell does with the signal.