The ovaries are located on each side of the uterus. Inside the ovaries are follicles containing im...
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The ovaries are located on each side of the uterus. Inside the ovaries are follicles containing immature eggs. Each month during ovulation, a follicle in one ovary releases a single mature egg for possible fertilization. Ovulation occurs in response to hormones called luteinizing hormone, or LH, and follicle-stimulating hormone, or FSH. LH and FSH are produced by the tiny pituitary gland at the base of the brain. LH and FSH also stimulate the ovarian follicles in the ovaries to produce estrogen and progesterone, which are responsible for female sexual characteristics and preparing the uterus for a fertilized egg. With aging, the number of ovarian follicles declines and the follicles become less responsive to LH and FSH, so they begin to produce less estrogen. Ovulation and menstruation become more irregular and eventually cease, which we call menopause. Along with these changes, skin may become drier. The hair on the head may thin; while facial hair becomes coarser and abdominal fat deposits may increase.