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Inhibin B

Serum Inhibin B
Serum (SST; cycle day 2–4 in women) pg/mL

About this test

Glycoprotein produced by Sertoli cells (male) and ovarian granulosa cells (female). In men, reflects spermatogenesis; in women, reflects antral follicle count and ovarian reserve.

Reference Ranges

Sex Age Range Notes
Female 18–35 yrs 23 – 257 Premenopausal; follicular phase
Male ≥ 18 yrs 80 – 400 Adult male (spermatogenesis marker)

Clinical Interpretation

Low / Decreased
Low — spermatogenic failure (male), diminished ovarian reserve (female), menopause.
Specimen
Serum (SST; cycle day 2–4 in women)
Reporting Unit
pg/mL
Category
🔄 Hormones

⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.