title: Extra embryos.
authors.affiliation: University of Maryland, USA.
authors.forename: Samuel J
authors.initials: SJ
authors.lastname: Kerstein
mesh_terms: D015925:Cryopreservation; D033041:Embryo Research; D004622:Embryo, Mammalian; D006801:Humans; D010686:Philosophy, Medical; D027724:Reproductive Techniques, Assisted