title: Effect of asynchronous transfer and oestrogen administration on survival and development of porcine embryos.
abstract: Results indicate that recovery of embryos on Days 11 and 13 of pregnancy was reduced for Day 5 embryos transferred to recipients on Day 6 of their oestrous cycle and was greatly reduced when embryos were transferred to recipients on Day 7 of the cycle (P less than 0.01). Administration of oestradiol-17 beta on Day 11 of the recipient's cycle did not appear to affect embryo development on Day 13. Day 6 embryos transferred to recipients on Day 8 of the oestrous cycle deteriorated rapidly within 24 h of transfer; there was no recovery of embryos from the uterus after 36 h. Treatment of pregnant gilts with 1 mg oestradiol-17 beta (i.v.) on Day 10.5 resulted in total embryonic loss by Day 23, but pregnancy rates of gilts treated with oestradiol-17 beta on Day 12 were similar to those of vehicle-treated gilts (60.6 vs. 71.4%).
authors.affiliation: Oklahoma Agricultural Experiment Station, Oklahoma State University, Stillwater 74078.
authors.forename: R D
authors.initials: RD
authors.lastname: Geisert
authors.forename: G L
authors.initials: GL
authors.lastname: Morgan
authors.forename: M T
authors.initials: MT
authors.lastname: Zavy
authors.forename: R M
authors.initials: RM
authors.lastname: Blair
authors.forename: L K
authors.initials: LK
authors.lastname: Gries
authors.forename: A
authors.initials: A
authors.lastname: Cox
authors.forename: T
authors.initials: T
authors.lastname: Yellin
mesh_terms: D000818:Animals; D001755:Blastocyst / Q000473:pathology; D004624:Embryo Transfer / Q000379:methods*; D005314:Embryonic and Fetal Development / Q000502:physiology*; D004958:Estradiol / Q000494:pharmacology*; D004971:Estrus / Q000502:physiology*; D005260:Female; D005313:Fetal Death / Q000473:pathology; D005865:Gestational Age; D011247:Pregnancy; D013552:Swine / Q000502:physiology*; D014599:Uterus / Q000502:physiology*
chemical_list: D004958:Estradiol