Final answer:
The prenatal stage refers to the period of development that occurs before birth, and it is divided into three stages: germinal, embryonic, and fetal.
Step-by-step explanation:
The prenatal stage refers to the period of development that occurs before birth. It is divided into three stages: germinal, embryonic, and fetal. The germinal stage lasts about two weeks and begins with fertilization and ends with implantation of the zygote into the uterine lining. The embryonic stage lasts about six weeks and is characterized by the development of body structures and organs. The fetal stage begins at around 9 weeks and continues until birth, during which the body, brain, and organs grow rapidly.