+A [fetus](/wiki/fetus) is a developing mammal or other viviparous vertebrate in the later stages of [gestation](/wiki/gestation). From the end of the embryonic stage until [birth](/wiki/birth), it grows and matures within the parent, forming all major body structures.
+## See also
+- [Embryo](/wiki/embryo)
+- [Pregnancy](/wiki/pregnancy)
+- [Development](/wiki/development)
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