Prenatal development progresses from the

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Prenatal development typically progresses from the germinal stage, which begins at fertilization and lasts about two weeks, to the embryonic stage, which lasts from the end of the germinal stage to about 8 weeks after conception. After the embryonic stage, development enters the fetal stage, which lasts from 9 weeks after conception until birth. The placenta is a temporary organ that forms during pregnancy to provide nutrients and oxygen to the developing fetus, but it is not a stage of prenatal development. The zygote is the initial stage of prenatal development, but it quickly develops into the germinal stage.

Prenatal Development Progresses from the