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| Description: Animated Changes in the ovary and uterus correlated with changing hormone levels. We start with the onset of menstrual flow on day one of a twenty-eight-day menstrual cycle. (c,d) Early on, estrogen from a maturing follicle stimulates repair and rebuilding of the endometrium. After ovulation, the corpus luteum secretes some estrogen and more progesterone that primes the uterus for pregnancy. If pregnancy occurs, the corpus luteum will persist, and its secretions will stimulate the maintenance of the uterine lining. Picture Stats: Views: 146 Filesize: 386.36kB Height: 1500 Width: 872 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=47410 |