throughout the first week of human development, the fertilized oocyte divides to form a blastocyst earlier than implantation into the uterine wall.
What are the stages of development after fertilization?
The process of prenatal development occurs for three main. the first two weeks after theory are referred to as the terminal degree, the third through the eighth week is called the embryonic period, and the time from the ninth week till birth is referred to as the fetal period.
The zygote undergoes some of the normal mitotic divisions that increase the number of cells inside the zygote however not its usual size. each cycle of division takes approximately 24 hours. The individual cells are known as blastomeres. at the 32-cell stage, the embryo is known as a morula.
It takes about 24 hours for a sperm cell to fertilize an egg. When the sperm penetrates the egg, the surface of the egg changes so that no other sperm can enter. At the moment of fertilization, the baby's genetic makeup is complete, including whether it's a boy or girl.
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