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孕酮(黄体酮)是由卵巢黄体分泌的一种天然孕激素,在体内对雌激素激发过的子宫内膜有显著形态学影响,为维持妊娠所必需。其药理作用主要为:1在月经周期后期使子宫黏膜内腺体生长,子宫充血,内膜增厚,为受精卵植入作好准备。受精卵植入后则使之产生胎盘,并减少妊娠子宫的兴奋性,抑制其活动,使胎儿安全生长。2在与雌激素共同作用下,促使乳房充分发育,为产乳作准备。3使子宫颈口闭合,黏液减少变稠,使精子不易
Progesterone (progesterone) is a natural progestin secreted by the corpus luteum and has a significant morphological impact on estrogen-stimulated endometrium in vivo, necessary for the maintenance of pregnancy. Its pharmacological effects are: 1 in the late menstrual cycle so that the growth of uterine mucosa glands, uterine congestion, thickening of the intima for the preparation of fertilized egg implantation. Fertilized eggs are made after the placenta is implanted, and reduce the excitability of pregnant uterus, inhibit its activity, the fetus safe growth. 2 In conjunction with estrogen, to promote full development of the breast in preparation for milk production. 3 so that the cervix closed, mucus to reduce thickening, so sperm is not easy