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Brewer's: Embryo

means that which swells inside something (Greek, en-bru'o, which gives the Greek embruon); hence the child in the womb; the rudiment in a plant before it shows itself in a bud; an idea not…

embryo

(Encyclopedia) CE5 Development of the human embryo embryoembryoĕmˈbrēō [key], name for the developing young of an animal or plant. In its widest definition, the embryo is the young from the…

embryo screening

(Encyclopedia) embryo screening, procedure (see genetic testing) in which a single cell is removed from an embryo two or three days after it has been conceived through in vitro fertilization and…

endoderm

(Encyclopedia) endodermendodermĕnˈdədûrmˌ [key], in biology, inner layer of tissue formed in the gastrula stage of the developing embryo. At the end of the blastula stage, cells of the embryo are…

mesoderm

(Encyclopedia) mesoderm, in biology, middle layer of tissue formed in the gastrula stage of the developing embryo. At the end of the blastula stage, cells of the embryo are arranged in the form of a…

in vitro fertilization

(Encyclopedia) in vitro fertilizationin vitro fertilizationvēˈtrō, vĭˈtrō [key] (IVF), technique for conception of a human embryo outside the mother's body. Several ova, or eggs, are removed from the…

fetus

(Encyclopedia) fetus, term used to describe the unborn offspring in the uterus of vertebrate animals after the embryonic stage (see embryo). In humans, the fetal stage begins seven to eight weeks…