Competition between split and nonmanipulated embryos in the production of identical piglets.

Competition between split and nonmanipulated embryos in the production of identical piglets. Research Abstract Details 

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Competition between split and nonmanipulated embryos in the production of identical piglets. Abstract Text:

K Ash,G B Anderson,R H Bondurant,R L Pashen,K M Parker,T Berger,

The effect of nonmanipulated embryos on in utero survival of split porcine embryos was examined in this study. Previously, only limited success in the production of identical twin piglets has been reported. Embryos were collected from slaughtered donors (4 to 7 d post estrus) and were either split with the aid of a micromanipulator or left as whole embryos. Monozygotic pairs of split embryos were then surgically transferred to recipients with a complement of either split or nonmanipulated embryos. A total of 217 split embryos and 60 nonmanipulated embryos were transferred to 19 recipients. Nine of these recipients farrowed. In the two recipients that received only split embryos and farrowed, 31% of the split embryos survived to term, including two sets of monozygotic twins. In the remaining seven recipients, only 10% of the split embryos that were transferred along with nonmanipulated embryos survived to farrowing. This difference in split embryo survival (31 vs 10%) was significantly different (P<0.005). Sixty-nine percent of the nonmanipulated embryos survived to term in recipients that maintained pregnancy. Data presented in this study suggest that competition occurs between split and nonmanipulated embryos transferred to the same uterine environment.

Competition between split and nonmanipulated embryos in the production of identical piglets. Publishing Authors By Initials

K Ash,GB Anderson,RH Bondurant,RL Pashen,KM Parker,T Berger,

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Competition between split and nonmanipulated embryos in the production of identical piglets. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 31

Page Numbers: 903-10

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 26

MONTH: Apr

YEAR: 1989

Competition between split and nonmanipulated embryos in the production of identical piglets. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Competition between split and nonmanipulated embryos in the production of identical piglets.

AFFILIATION: Department of Animal Science, School of Veterinary Medicine University of California, Davis CA 95616 USA.

Country: United States

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MEDLINETA: Theriogenology

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