title: Tetraploidy and aneuploidy after observation of diploid fertilization in vitro.
abstract: A case is described in which a tetraploid and aneuploid conceptus resulted from dipronuclear embryos from in vitro fertilization. This finding strongly suggests that, after a meiotic error in either the egg or sperm, polyploidy has occurred as the result of a postfertilization mitotic error.
authors.affiliation: Genetics & IVF Institute, Fairfax, Virginia 22031.
authors.forename: S D
authors.initials: SD
authors.lastname: Bender
authors.forename: A D
authors.initials: AD
authors.lastname: Dorfmann
authors.forename: J D
authors.initials: JD
authors.lastname: Schulman
authors.forename: M
authors.initials: M
authors.lastname: Bustillo
mesh_terms: D000328:Adult; D000782:Aneuploidy; D002824:Chorionic Villi / Q000032:analysis; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D011123:Polyploidy