title: Frozen embryos to be stored for longer.
authors.forename: G
authors.initials: G
authors.lastname: Martell
mesh_terms: D015925:Cryopreservation; D033041:Embryo Research; D004624:Embryo Transfer; D004622:Embryo, Mammalian; D006801:Humans; D018587:Oocyte Donation; D013094:Spermatozoa; D013997:Time Factors