define feotus and embryo
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The embryo is defined as the developing pregnancy from the time of fertilization until the end of the eighth week of gestation, when it becomes known as a fetus,” says James A. O'Brien, MD, medical director of inpatient obstetrics at Women & Infants Hospital of Rhode Island.
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1.In human development, afetus(/ˈfiːtəs/; plural"fetuses"), also spelled foetus, is a prenatal humanbetweenitsembryonicstate and its birth. Thefetalstage of development tends to be taken as beginning at thegestational age of eleven weeks, i.e. nine weeks after fertilization. In biological terms, however,prenatal development is a continuum, with no clear defining featuredistinguishing an embryo froma fetus. The useof the term"fetus" generally implies that an embryo has developed to the point of being recognizable asa human; this isthe point usually taken tobe the ninth week after fertilization. A fetus is also characterized by the presenceof all the major body organs, though they willnot yet be fully developed and functional and some not yet situated in their final
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