. "EmbryologicADNCI" . "Early stage in the development of a plant or an animal. In vertebrate animals (have a backbone or spinal column), this stage lasts from shortly after fertilization until all major body parts appear. In particular, in humans, this stage lasts from about 2 weeks after fertilization until the end of the seventh or eighth week of pregnancy.NCI-GLOSS" . "C28147"^^ . "embryoPTNCI-GLOSSCDR0000044202" . "Embryonic Structure"^^ . . . "C0013935"^^ . "Embryo"^^ . "Embryo"^^ . "EmbryoPTNCI" . "Embryo"^^ .