妊娠

在孕妇能够分娩一个足月的宝宝之前，在她的体内会发生令人心醉的和非常复杂的胎儿发育过程。甚至于至今，我们还没有完全弄清楚这个过程的精确机制。不过，我们能够描述它的主要发育阶段。本节将概述受精卵通过数个发育阶段如何发育成在子宫外能存活的和独立的人类个体，也将讲述孕妇怎样经历这一胎儿发育过程。

Pregnancy

Before a woman can deliver a healthy baby, a fascinating and extremely complex process of growth has to take place within her body. Even today, the exact mechanisms of this process are not completely understood. Nevertheless, its main phases can be described. The following sections summarize how the fertilized egg develops through various stages into a viable and independent human being and how this development is experienced by the pregnant woman.