The first two weeks of prenatal development after conception, characterized by rapid cell division and the beginning of cell differentiation.
The stage of prenatal development from the ninth week after conception until birth, during which the fetus gains about 7 labs and organs become more mature, gradually able to function on their own
Stage of prenatal development from approx. the third through the eighth week after conception, during which the basic forms of all body structures, including internal organs, develop
The process, beginning about 10 days after conception, in which the developing organism burrows into the placenta that lines the uterus, where it can be nourished and protected as it continues to develop