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Germinal Stage
The germinal stage is the prenatal, developmental stage that begins at conception and lasts through the second week (that is still prenatal/before birth) of pregnancy. During this time, the fertilized egg (now called a zygote, and consists of a single cell) makes its way down the fallopian tube and begins to have cell reproduction. Eventually, the single-celled zygote becomes a multi-celled ball that attaches itself to the wall of the uterus around the end of the second week, which constitutes the beginning of the embryonic stage.
