title: A fifteen-year search for first-stage human ova.
authors.affiliation: Department of Pathology, Harvard Medical School, Boston.
authors.forename: A T
authors.initials: AT
authors.lastname: Hertig
mesh_terms: D001900:Boston; D002970:Cleavage Stage, Ovum / Q000473:pathology; D004626:Embryology / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D010063:Ovum / Q000002:abnormalities; D012106:Research; D013997:Time Factors