FSH (follicle-stimulating hormone) is released by the pituitary gland in the brain to push the ovaries to develop follicles (the immature sacs that mature and release an egg when we ovulate) and produce oestrogen. As ovarian function naturally declines with age, oestrogen levels drop, and the pituitary gland recognises this and pumps out more FSH to try and get the ovaries to work harder so FSH usually rises in late perimenopause and postmenopause. However, this will not happen consistently in t

Elevated basal FSH levels can indicate potential fertility challenges. It often correlates with lower oocyte yield during stimulation and a reduced likelihood of live birth through IVF or natural conception. Some women may experience a faster onset of menopause. However, relying solely on a single FSH measurement has limitations. FSH levels can fluctuate between cycles, especially in perimenopausal women, and high estradiol levels can artificially suppress FSH readings. Understanding these nuanc

147h, "Understanding Blood Tests: What FSH (Follicle Stimulating Hormone) Reveals About Your Health"