II. Physiology
- Ovarian follicles decrease with aging to Perimenopause (thousands of follicles) to Menopause (<1000 follicles)
III. Labs
-
Anti-Mullerian Hormone (AMH)
- Stable marker of ovarian reserve (gradually declines from age 25 to Menopause)
- AMH <1.0 suggests decreased ovarian reserve
-
Follicle Stimulating Hormone (FSH)
- Obtain on day 3 of cycle
- FSH >10 IU/L suggest decreased ovarian reserve (but poor reliability due to variable levels)
-
Estradiol (E2)
- Obtain on day 3 of cycle
- Estradiol decreased in decreased ovarian reserve
IV. Imaging
- Pelvic Ultrasound
- Ovarian Volume
- Antral follicle count
- Count follicles 2-10 mm in diameter during early Follicular Phase