Chapter 51.7, Problem 11LO

Summary Introduction

To describe: The general course of the early development of human beings includes fertilization, fates of trophoblast and inner cell mass, implantation, and the role of placenta.

Introduction: The gestation period of human beings is the total duration of pregnancy. It lasts for an average of 266 days from the time of fertilization to the actual time of birth of a baby. It includes various important aspects such as process of fertilization, trophoblast, and inner cell mass formation, implantation, and formation of the placenta.