Examlex
The cluster of cells that implants in the uterus and lays the foundation for the development of the placenta and the eventual development of the fetus is the
Implantation
The process by which a fertilized egg attaches itself to the wall of the uterus so that the embryo can begin to grow.
Embryonic Period
A crucial stage of human development that occurs in the first 8 weeks after fertilization, during which vital organs and structures begin to form.
Conception
The process of a sperm fertilizing an ovum, resulting in the beginning of a pregnancy.
Age Of Viability
The age at which the fetus may survive if born prematurely; begins about 22 weeks after conception.
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