Course 2
Labor and Delivery
1st Stage of Labor
2nd Stage of Labor
Illustration 1
Illustration 2
Illustration 3
3rd Stage of Labor
Complications
The Second Stage of Labor
分娩

分娩與助產

第二產程
第二產程明顯比第一產程要短(初產婦約2個小時,經產婦約1個小時。)在此期,胎兒的頭部先通過子宮頸,經由陰道向外娩出。
產婦能夠通過收縮腹部肌肉為加速分娩進程做更多的努力,她要用全部精力將胎兒娩出。一旦胎頭露了出來,身體其餘部分隨後就容易娩出了。 
此時,新生兒仍然通過臍帶與位於子宮內的胎盤相連。但是,從此刻起,營養和氧氣的這個來源不再需要了。溫度和大氣壓的忽然變化(有時也包括拍拍寶寶臀部)導致寶寶吸入第一口空氣。寶寶的呼吸一變得規則起來,臍帶就會被剪斷,只保留從腹部延伸的一小段(因為臍帶不含有神經,所以剪臍帶是不疼的)。過了一會兒,子宮內的殘留物會排空並自動跌落出來。
Birth
Labor and Delivery
The Second Stage of Labor
The second stage of labor is considerably shorter than the first. (About two hours for women delivering their first baby and about one hour for the others.) During this time, the baby passes head first from the uterus through the vagina into the outside world. The mother can do much to help this process by contracting her abdominal muscles and bearing down with all her strength. Once the head has emerged, the rest of the baby's body follows easily.
The newborn child is still connected to the placenta inside the uterus by the umbilical cord. However, from now on this source of nourishment and oxygen is no longer needed. The sudden change in temperature and atmospheric pressure (sometimes also a slap on the buttocks) causes the baby to draw the first breath. As soon as breathing has become regular, the umbilical cord is cut a few inches from the abdomen. (There is no pain since the cord does not contain any nerves.) After a while, the remaining stub dries up and then falls off by itself.

[Course 2] [Description] [How to use it] [Introduction] [Conception] [Pregnancy] [Birth] [Historical Notes] [Modern Childbirth] [Labor and Delivery] [After Delivery] [Lactation] [Sexual Intercourse] [Infertility] [Contraception] [Abortion] [Additional Reading] [Examination]