Fetus
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A fetus or foetus is the unborn offspring of a viviparous animal that develops from an embryo. Following the embryonic stage, the fetal stage of development takes place. Prenatal development is a cont
Fourteen phases of elephant development before birth
Fetal stage of a porpoise
A human fetus, attached to placenta, at three months gestational age
3D ultrasound of 80-millimetre (3 in) fetus (about 3+1⁄2 months gestational age)
Embryo
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An embryo is the initial stage of development for a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilizati
Fetus
…A fetus or foetus (; pl.: fetuses or foetuses) is the unborn offspring of a viviparous animal that develops from an embryo. Following the embryonic stage, the fetal stage of development takes place. Prenatal development is a continuum, with no clear defining feature…
A human embryo seven weeks after conception (nine weeks gestational age)
Embryos (and one tadpole) of the wrinkled frog (Rana rugosa)
Mouse and snake embryos
The inside of a Ginkgo seed, showing the embryo