<P> The proliferative phase is the second phase of the uterine cycle when estrogen causes the lining of the uterus to grow , or proliferate , during this time . As they mature , the ovarian follicles secrete increasing amounts of estradiol , and estrogen . The estrogens initiate the formation of a new layer of endometrium in the uterus , histologically identified as the proliferative endometrium . The estrogen also stimulates crypts in the cervix to produce fertile cervical mucus , which may be noticed by women practicing fertility awareness . </P>
<P> The proliferative phase is the second phase of the uterine cycle when estrogen causes the lining of the uterus to grow , or proliferate , during this time . As they mature , the ovarian follicles secrete increasing amounts of estradiol , and estrogen . The estrogens initiate the formation of a new layer of endometrium in the uterus , histologically identified as the proliferative endometrium . The estrogen also stimulates crypts in the cervix to produce fertile cervical mucus , which may be noticed by women practicing fertility awareness . </P>
what hormone is most important in the proliferative phase of the uterine cycle
what hormone is most important in the proliferative phase of the uterine cycle
estrogen
estrogen