The effects of low level of feeding on response to synchronization of estrus, ovulation rate and embryo loss in goats.

The effects of low level of feeding on response to synchronization of estrus, ovulation rate and embryo loss in goats. Research Abstract Details 

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The effects of low level of feeding on response to synchronization of estrus, ovulation rate and embryo loss in goats. Abstract Text:

A U Mani,W A McKelvey,E D Watson,

Mature nonlactating British Saanen and Toggenburg does with a body score 2 were fed 25% (n=24) and 100% (n=16) maintenance rations from about 19 days before mating until slaughter at approximately 60 days after mating. Estrus was synchronized using PGF(2alpha), and the ovulation rate was determined by laparoscopic examination of the ovaries once between Days 6 and 10 after mating. Pregnancy rate, potential kidding rate and embryo loss were determined by counts of viable fetuses at slaughter. The proportion of does in estrus within 96 hours of PGF(2alpha) administration was not different (P<0.5) between the feed-restricted and the maintenance groups (71.0% and 87.5%, respectively); however, the time of onset of estrus after PGF(2alpha) tended to be longer (P=0.12) in the feed-restricted group. Ovulation rate, incidence of multiple ovulations and proportion of does pregnant at 60 days were significantly lower (P=0.0004, P=0.025, P=0.05, respectively) in the restricted group. More embryos from single than multiple ovulations were lost in the restricted group (P=0.01). There was no difference in the overall ovulatory activity between right and left ovaries in the 2 groups. Transuterine migrations were observed in all does that had unilateral multiple ovulations. No migration was observed in does which had single ovulations. These data indicate that restricted feed intake in goats tended to delay the onset of estrus and lowered the ovulation rate, incidence of multiple ovulations, and pregnancy rate.

The effects of low level of feeding on response to synchronization of estrus, ovulation rate and embryo loss in goats. Publishing Authors By Initials

AU Mani,WA McKelvey,ED Watson,

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The effects of low level of feeding on response to synchronization of estrus, ovulation rate and embryo loss in goats. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 38

Page Numbers: 1013-22

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 26

MONTH: Dec

YEAR: 1992

The effects of low level of feeding on response to synchronization of estrus, ovulation rate and embryo loss in goats. Information

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LANGUAGE: eng

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Grant and Affiliation Information for The effects of low level of feeding on response to synchronization of estrus, ovulation rate and embryo loss in goats.

AFFILIATION: Department of Veterinary Clinical Studies, Veterinary Field Station Easter Bush Roslin Midlothian EH25 9RG, Scotland.

Country: United States

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MEDLINETA: Theriogenology

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