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The estrogen in the body causes the pituitary gland to release LH stimulating the ovary to produce a ripe egg.
Review Date 3/31/2024
Updated by: LaQuita Martinez, MD, Department of Obstetrics and Gynecology, Emory Johns Creek Hospital, Alpharetta, GA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.