The young or embryo of a vertebrate animal in the womb, or in the egg; often restricted to the later stages in the development of viviparous and oviparous animals. showing the main recognizable features of the mature animal, embryo being applied to the earlier stages.
latter stages of the developing young of an animal; in humans, the developing organism in utero from the beginning of the third month to birth
An animal in the later stage of development before birth. In humans, the fetal stage is the from the end of the third month until birth.