PMID: 11914113Mar 27, 2002Paper

Embryo development and establishment of pregnancy after embryo transfer in pigs: coping with limitations in the availability of viable embryos

Reproduction : the Official Journal of the Society for the Study of Fertility
T J KingIan Wilmut

Abstract

Embryo transfer and pregnancy maintenance strategies in pigs were evaluated with reference to situations in which limited numbers of viable embryos or micromanipulated embryos are available, such as pig cloning. Development of embryos with compromised zona pellucida was compared with development of embryos with intact zona pellucida. Micromanipulation had no effect on blastocyst production rates after development in vivo or in vitro, but development in vivo improved the number of embryos reaching the blastocyst stage. Transfer of embryos with compromised zona pellucida resulted in live piglets. Several hormone treatments to maintain pregnancy were tested in a model in which three embryos were transferred into unmated recipient gilts, compared with transfer of three embryos into mated recipients. None of the hormonal treatments resulted in pregnancy rates of more than 25% at term and no more than 9% of transferred embryos survived, in comparison with 50% of the mated recipients successfully carrying 25% of transferred embryos. Lastly, the developmental potential of parthenogenetic embryos was assessed and 62% of transferred embryos resulted in pregnancies, none of which continued beyond day 55 of gestation. After co-transfer of ...Continue Reading

Citations

Jan 22, 2004·Cloning and Stem Cells·Cesare GalliGiovanna Lazzari
Dec 18, 2009·Reproduction : the Official Journal of the Society for the Study of Fertility·Michiko NakaiKazuhiro Kikuchi
Apr 7, 2005·Médecine sciences : M/S·Nathalie BeaujeanJean-Paul Renard
Nov 3, 2009·Theriogenology·A ThongphakdeeM Techakumphu
Feb 3, 2015·Animal Reproduction Science·Junsong ShiZicong Li
May 24, 2011·Preventive Veterinary Medicine·Wilfried A Kues, Heiner Niemann
Dec 5, 2002·Chembiochem : a European Journal of Chemical Biology·Micaela CasertaErnesto Di Mauro
Jun 30, 2006·Biology of Reproduction·Elena PopovaAlexander Krivokharchenko
Aug 12, 2017·Animal Science Journal = Nihon Chikusan Gakkaihō·Yoshiyuki Nakamura, Kazuhiro Kikuchi
Nov 25, 2003·Nature Reviews. Genetics·Susan M RhindIan Wilmut
Sep 7, 2012·Reproduction, Fertility, and Development·Geon A KimByeong Chun Lee

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