Leads to the formation and organization of all the diverse cell types in the body.
Ensures that new individuals are produced from generation to generation.
The study of events occurring prior to birth.
First 38 weeks of human development that begin wither fertilization of the secondary oocyte and end with birth.
First 2 weeks of development, when the single cell produced by fertilization (the zygote) becomes spherical, mulicellular structure (a blastocyst). This period ends when the blastocyst implants in the lining of the uterus.
Includes the third through eighth weeks of development. It is a remarkably active time during which rudimentary versions of the major organ systems appear in the body, which is now called an embryo.