what is fsh test for female

The follicle-stimulating hormone (FSH) test measures the level of FSH in a female's blood. FSH is made by the pituitary gland and plays a crucial role in sexual development and functioning. In women, FSH helps control the menstrual cycle and stimulates the growth of eggs in the ovaries. The test is used to help diagnose or evaluate various conditions, including infertility, irregular menstrual periods, ovarian function, and menopause. FSH levels in women change throughout the menstrual cycle, with the highest levels occurring just before ovulation. Normal FSH levels in women who are still menstruating range from 4.7 to 21.5 mIU/mL, while after menopause, the range is 25.8 to 134.8 mIU/mL