推荐回答(2个)
1、黄体的形成:是卵巢在排出卵子以后,卵泡壁出现有塌陷的情况,然后卵泡膜的结缔组织以及毛细血管深入到颗粒层,体积会变得逐渐长大,形成细胞团,在新鲜的时候呈现为黄色,称为黄体。
2、结构:如未受精形成的称月经黄体,如受精则为妊娠黄体。排卵后卵泡壁塌陷,颗粒层向内形成皱襞,伴有卵泡膜内层毛细血管出血,伤口愈后,卵泡腔封闭,腔内充满浆液性液体及血液,同时基膜崩溃,结缔组织和血管随之长入粒层。
3、功能:在月经周期后期使子宫粘膜内腺体生长,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。

4、种类
粒黄体细胞(Granulosa lutein cell) :由卵泡颗粒细胞转变成粒黄体细胞,位于黄体中央,细胞大,染色淡,主要分泌孕酮。
膜黄体细胞(Theca lutein cell):位于黄体周边,表面不平坦。细胞小,染色深,主要合成雌激素。
5、转变:可因排卵前雌激素分泌不足,致黄体发育不良而过早萎缩。黄体发育不全时,则分泌功能欠佳,使孕酮分泌量不足。临床表现有规律的月经周期,但周期缩短,或经前数日即有少量出血,经血量可无变化。
以上内容参考:百度百科-黄体
黄体的形成及结构
如未受精形成的称月经黄体,如受精则为妊娠黄体。排卵后卵泡壁塌陷,颗粒层向内形成皱襞,伴有卵泡膜内层毛细血管出血,伤口愈后,卵泡腔封闭,腔内充满浆液性液体及血液,同时基膜崩溃,结缔组织和血管随之长入粒层,在黄体生成素(luteinizing hormone,LH)作用下,颗粒细胞和卵泡膜内层细胞分裂增生,细胞成多边形,胞质内有黄色颗粒和脂滴,呈黄色,故名黄体。黄体细胞以颗粒细胞占多数,细胞大,着色浅,分泌孕酮;泡膜黄体细胞小,大部位于黄体外周,细胞较少,核和质都较黄体细胞深,分泌雌激素。黄体存在时间多少,视排出的卵受精与否,若卵子未受精,黄体仅维持二周即萎缩,被结缔组织结疤所代替,即白体(corpusalbicans);若卵子受精成功并开始妊娠,黄体继续增长,至妊娠6个月甚至更长时间后慢慢萎缩。 黄体由两种细胞组成:
粒黄体细胞(Granulosa lutein cell) :由卵泡颗粒细胞转变成粒黄体细胞,位于黄体中央,细胞大,染色淡,主要分泌孕酮。
膜黄体细胞(Theca lutein cell):位于黄体周边,表面不平坦。细胞小,染色深,主要合成雌激素。
黄体的功能或作用
卵巢黄体分泌黄体酮,黄体酮是一种天然孕激素,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。
其作用主要为:1.在月经周期后期使子宫粘膜内腺体生长,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,粘液减少变稠,使精子不易穿透;大剂量时通过对下丘脑的负反馈作用,抑制垂体促性腺激素的分泌,产生抑制排卵作用。4.可以抑制平滑肌收缩
黄体功能不全
可因排卵前雌激素分泌不足,致黄体发育不良而过早萎缩。黄体发育不全时,则分泌功能欠佳,使孕酮分泌量不足。临床表现有规律的月经周期,但周期缩短,或经前数日即有少量出血,经血量可无变化。经前期子宫内膜活检可见腺体分泌不良或不均。间质水肿不明显。基础体温双相型,但上升缓慢,黄体期较正常短,一般在10天左右。由于孕酮不足,往往形成不孕或早期流产。
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