What Does a Comprehensive Sex Hormone Panel Test Include?

Sex hormone panel testing—commonly referred to as the “six-sex-hormone panel”—is a standard endocrine evaluation used to assess reproductive and adrenal function in both women and men. The six analytes routinely measured include follicle-stimulating hormone (FSH), luteinizing hormone (LH), estradiol (E2), progesterone (P4), testosterone (T), and prolactin (PRL). Each serves a distinct physiological role: FSH and LH are pituitary gonadotropins critical for gametogenesis and steroidogenesis; estradiol reflects ovarian follicular activity and estrogenic status; progesterone indicates ovulatory function and luteal phase adequacy; total testosterone evaluates androgen production, particularly relevant in cases of hirsutism, amenorrhea, or suspected hypogonadism; and prolactin, also secreted by the anterior pituitary, modulates lactation and can suppress gonadotropin release when elevated.

The timing and clinical context of testing significantly influence interpretation. In women of reproductive age, blood is ideally drawn on cycle day 2–5 to assess baseline gonadotropin and estradiol levels, while progesterone is best measured approximately seven days after ovulation (typically day 21 in a 28-day cycle) to confirm ovulation. Men and postmenopausal women may be tested at any time, though morning sampling is preferred for testosterone due to diurnal variation. Clinicians order this panel to investigate infertility, menstrual disorders (e.g., oligomenorrhea, amenorrhea), polycystic ovary syndrome (PCOS), premature ovarian insufficiency, suspected hyperprolactinemia, or symptoms of androgen excess or deficiency.

It is important to recognize that results must always be interpreted in conjunction with clinical presentation, physical examination findings, and additional diagnostic studies—such as pelvic ultrasound or thyroid function tests—when indicated. No single hormone value is diagnostic in isolation; rather, the pattern of hormone interrelationships (e.g., elevated LH:FSH ratio in PCOS, low FSH/LH with low estradiol in hypothalamic amenorrhea) provides critical diagnostic insight.