2021
DOI: 10.21203/rs.3.rs-1082913/v1
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The Effects of Ram Exposure, Progestogen and eCG on Reproductive Performance of Fat Tail Ewes in Non-Breeding Season

Abstract: Sheep are considered short-day breeders. Exposure of rams to anestrus ewes results in an increase in LH secretion. The aims of this study was to determine whether the presence and exposure of rams can effect on reproductive performance such as: pregnancy rate, litter size, sex of lamb, fecundity rate and prolificacy rate of fat tail Iranian Shaal breed ewes in non-breeding season using progesterone (p4) analogue with or without equine chorionic gonadotropin (eCG). Totally, 100 ewes out of 138 non-cyclic ewes w… Show more

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“…In addition, twinning, calving, fecundity and proliferative rates were increased in the P4, PMSG and ram exposure treatment subgroups compared to the control group. The possible results o btained are not significant (Garoussi et al, 2021).…”
Section: Resultsmentioning
confidence: 86%
“…In addition, twinning, calving, fecundity and proliferative rates were increased in the P4, PMSG and ram exposure treatment subgroups compared to the control group. The possible results o btained are not significant (Garoussi et al, 2021).…”
Section: Resultsmentioning
confidence: 86%