title: Counting on embryos.
authors.forename: Gary
authors.initials: G
authors.lastname: Langer
mesh_terms: D015925:Cryopreservation; D033001:Directed Tissue Donation; D019924:Embryo Disposition; D033041:Embryo Research; D053595:Embryonic Stem Cells; D006801:Humans; D012494:Sampling Studies; D014481:United States