Embryology

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This is the study of embryos or babies in the mother's stomach (although it does not only involve humans or mammals). In science the study of embryology begins when the male and femal sex cells or gametes create an egg if the animal has sex to make more of itself. Sometimes embryology can refer to reproduction (in humans sex) that is not sexual.


[edit] Carnegie Stages

Scientists have named 23 stages (or levels) that an embryo goes through in 60 days. These stages usally only apply to human beings or other big animals.