Effect of Combined or Separate Administration of Beta Carotene-Vitamin E and hCG on Fertility in Sheep Lambs
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Date
2022
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Ankara Üniversitesi
Abstract
This study was performed to investigate the effect of beta carotenevitamin E and hCG treatments alone or a combination of both on fertility
in estrus synchronized Awassi ewe lambs. A total of 103 Awassi ewe
lambs were divided into four groups before the study. Lambs were treated
with a progesterone sponge for 12 days, PGF2α two days before sponge
removal, 600 IU PMSG on sponge removal day, and 150 IU hCG on the
day of mating. The control group (n: 25) did not receive any additional
treatment. The Vitamin group (β carotene + vitamin E) (n: 26) was treated
twice with vitamin combination. The first treatment was on the 7th day
before the sponge insertion and the second treatment was on the day of
mating. The hCG group (n: 24) was treated with 150 IU hCG on day 12
after mating. The HCG + vitamin group (n: 28) was treated with both β
carotene-vitamin E and hCG. Ewe lambs standing to be mounted were
considered in estrus and mated. Pregnancy was determined by ultrasound
the 30th day after the mating. There were no significant differences
between the control and hCG, vitamin and hCG + vitamin groups
concerning estrus, conception, lambing, abortion, twinning, fecundity
rate, and litter size (P>0.05). It was concluded that the treatments with βcarotene-vitamin E and hCG or both, in addition to estrus synchronization
out of the breeding season in Awassi ewe lambs did not improve the
investigated fertility indices.
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Keywords
Beta carotene;, Estrus synchronization