Estradiol (E2) is the most potent and predominant circulating estrogen in premenopausal women and is also present at lower concentrations in men and postmenopausal women. The ultrasensitive liquid chromatography-tandem mass spectrometry (LC/MS-MS) assay provides superior analytical sensitivity and specificity compared to conventional immunoassays, enabling accurate quantification at very low concentrations (typically <10 pg/mL). This methodology is particularly valuable in clinical scenarios where standard immunoassays lack the precision required for meaningful interpretation. In premenopausal women, estradiol is primarily synthesized by granulosa cells of the ovarian follicle under stimulation by FSH, with levels fluctuating across the menstrual cycle from approximately 20–150 pg/mL in the follicular phase to a midcycle surge of 200–500 pg/mL. In men and postmenopausal women, estradiol is produced predominantly through peripheral aromatization of androgens (testosterone and androstenedione) in adipose tissue, liver, and muscle. Estradiol exerts its effects via nuclear estrogen receptors (ERα and ERβ), influencing reproductive function, bone mineral density, cardiovascular health, lipid metabolism, and central nervous system function.
Estradiol is the main form of estrogen in the body and plays important roles in reproductive health, bone strength, heart health, and mood. This particular test uses a highly precise laboratory method called LC/MS-MS, which can detect very small amounts of estradiol that standard tests might miss. It is especially useful for men, postmenopausal women, children, and people taking medications that lower estrogen levels. Your doctor uses this test to understand how your hormones are functioning and to guide decisions about your health or treatment. Results should always be discussed with your healthcare provider in the context of your overall health picture.
When elevated: Elevated estradiol may be associated with ovarian hyperstimulation, estrogen-secreting tumors (granulosa cell tumors, adrenal tumors), gynecomastia in males, exogenous estrogen exposure, liver disease impairing estrogen metabolism, obesity-related increased aromatization, or precocious puberty in children. When low: Low estradiol levels may be associated with hypogonadotropic hypogonadism, premature ovarian insufficiency, menopause, hypothalamic amenorrhea, hyperprolactinemia, pituitary insufficiency, anorexia nervosa, excessive exercise, or effective aromatase inhibitor therapy in oncology patients.
Estradiol influences bone mineral density, cardiovascular function, and recovery—factors relevant to endurance and strength athletes. In female athletes, chronically suppressed estradiol from excessive training load or low energy availability can impair bone health and increase injury risk; in male athletes, estradiol balance (via aromatization) supports bone strength and cardiovascular stability, though the ultrasensitive LC/MS method is primarily used to detect very low or pathological levels rather than optimize performance in healthy individuals.
Turnaround Time
7 days (up to 13 days)
Fasting Required
No
Method
LC/MS
verifiedGold StandardMass spectrometry — higher accuracy, especially at low concentrations
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$35.90$80
2.2× less than retail
Versus the typical direct-to-consumer retail price for this test (illustrative — consumer prices vary by provider and region).
$35.90
$39.90
$44.90
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