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Also reported in: IU/L
Your FSH is within the normal reference range for the follicular phase. This is a reassuring fertility marker indicating adequate pituitary-ovarian communication.
Your FSH is very low. In the follicular phase, very low FSH may indicate pituitary failure or hypothalamic amenorrhea (common with excessive exercise, low body weight, or eating disorders). Without adequate FSH, follicle development and ovulation cannot occur.
Seek urgent endocrinology evaluation. Pituitary imaging (MRI), LH, prolactin, and nutritional assessment are needed. If hypothalamic amenorrhea is the cause, restoration of healthy weight and reduction of very large exercise are priorities.
FSH very low (<2 mIU/mL) — central hypogonadism; pituitary or hypothalamic dysfunctionYour FSH is below the typical reference range. Low FSH in the follicular phase can indicate hypothalamic amenorrhea, pituitary dysfunction, hyperprolactinemia, or use of hormonal medications. Without adequate FSH stimulation, follicle development and ovulation are impaired.
Discuss with your doctor or reproductive hormone specialist. Comprehensive hormonal evaluation including LH, prolactin, and pituitary imaging may be needed.
FSH below reference range — possible central hypogonadism or hypothalamic suppressionYour FSH is at the lower end of normal. This may be normal or may reflect mild hypothalamic suppression. In the fertility context, adequate FSH is needed for follicle development.
No urgent action in isolation. Discuss with your doctor if ovulation or cycle irregularities are present.
FSH: low-normal — adequate but suboptimal pituitary signalingYour FSH is within the normal reference range for the follicular phase. This is a reassuring fertility marker indicating adequate pituitary-ovarian communication.
No specific action required.
FSH within normal reference range — adequate pituitary signaling for follicle developmentYour FSH is in the optimal range. A low-to-normal FSH on day 2–5 of the cycle indicates that the pituitary does not need to work hard to stimulate the ovaries, reflecting good ovarian reserve.
No action needed. Excellent fertility indicator.
FSH in optimal range (3–8 mIU/mL) — excellent ovarian reserve indicatorYour FSH is borderline-elevated. When FSH rises, it indicates that the pituitary is working harder to stimulate the ovaries — a sign of declining ovarian reserve. Borderline FSH is associated with reduced IVF response and decreased natural conception rates.
Seek reproductive endocrinology consultation. AMH testing should be arranged to better characterize ovarian reserve. Fertility treatment planning should be discussed without delay.
FSH 10–15 mIU/mL — borderline elevated; diminishing ovarian reserve possibleYour FSH is noticeably elevated. High FSH indicates poor ovarian reserve, with the pituitary sending increasingly strong signals to stimulate declining ovarian function. This is associated with poor IVF response, low egg number, and reduced natural conception rates.
Seek urgent reproductive endocrinology consultation. IVF with your own eggs, egg donor planning, and fertility preservation options should all be discussed promptly. Time is of the essence.
FSH >15 mIU/mL — elevated; poor ovarian reserve; early ovarian insufficiency possibleYour FSH is very high. In reproductive-age women, FSH above 25 mIU/mL indicates primary ovarian insufficiency (POI), formerly called premature ovarian failure. This means the ovaries are no longer responding normally to FSH stimulation. Pregnancy with own eggs becomes very unlikely.
Seek urgent specialist evaluation. Primary ovarian insufficiency should be confirmed with repeat testing and AMH. Hormone replacement therapy for health protection, discussion of egg donation, and psychological support are all important aspects of management.
FSH >25 mIU/mL — very high; primary ovarian insufficiency (premature menopause) likelyUpload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.