Fetus: Prenatal organism between the embryonic state and birth
A fetus or foetus is the stage that an organism goes through before it is born as a baby.
In humans a fetus is the stage (time of development) after the embryonic stage, and begins during the third to eighth week of development after fertilization of the egg. The fetal stage lasts from 8 weeks after fertilization to birth. This stage can also take 9-12 weeks, if any mutations happen.
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