在月经周期的黄体期,内膜对妊娠的反应敏感称为蜕膜变。这种改变对于维持种植的孕卵是需要的,甚至是必须的。在大多数种属中,只发生于孕卵种植开始时。而在人的子宫中,约在黄体周期的中间时,子宫内膜也会有一些蜕膜样的改变。现在还不太清楚在哺乳类子宫中是什么刺激内膜形成蜕膜样改变的。一般来说它可由胚泡、创伤或某种高剂量的激素所引起。最初期的变化是毛细血管渗透性增高,这种变化有助于辨别蜕膜细胞,而在内膜渗透性增高的部位,前列腺素的水平也是升高的。前列腺素合成的抑制因子则可破坏或抑制蜕膜细胞的形成。至于形成蜕膜细胞的甾体情况还不十分清楚,小量的雌激素和孕激素可使大鼠的子 In the luteal phase of the menstrual cycle, endometrial sensitivity to pregnancy is called decidual change. This change is necessary, even necessary, to maintain the planted egg. In most species, it occurs only at the beginning of the pregnancy. In the human uterus, about the middle of the luteal phase, the endometrium will also have some decidual-like changes. It is not yet clear how in the mammalian uterus stimulates the formation of endometrial decidual-like changes. In general it can be caused by blastocysts, trauma, or some high-dose hormone. The initial change is capillary permeability increased, this change helps identify the decidual cells, and in the intimal permeability increased sites, prostaglandin levels are also elevated. Inhibitors of prostaglandin synthesis can destroy or inhibit the formation of decidual cells. As for the formation of decidual cells in the steroid situation is not very clear, a small amount of estrogen and progesterone rats can make the child