The effects of implementing CIDR at different days on sheep reproductive traits in out of mating season

This study was conducted to determine the effects on reproductive performances of CIDR implants in different periods (days) for 312 sheep of different ages, out of the mating season in private sheep enterprise. For this purpose, the sheep were divided into 3 groups by ages and body conditions. After applying CIDR (include 330 mg of Progesterone), they have been taken on fifth day for group 1, on seventh day for group 2 and twelfth day for group 3 and after removing CIDR; PMSG (400 IU), PGF2α (100µg) and GnRH (100 µg) injected (IM) to all. It has been determined that oestrus rate were found 86.53% for group 1 (5 days), 94.23% for group 2 (7 days) and 82.69% for group 3 (12 days), mating rates were 76.92%, 80.76% and 74.03%, the pregnancy rates were 58.65%, 56.73%, and 47.11%, litter size (prolificacy) by hundred lambed sheep were 146.42%, 128.57% and 136.17%, fecundity were 78.84%, 69.23% and 62.53%. Mortality rate of lambs at birth 7.32%, 4.17% and 1.54% were found respectively by groups. Birth weights of male and female lambs have been found 4.16 and 4.21 kg for group 1, 4.88 and 4. 46 kg for group 2 and 4.12 and 4.30 kg for group 3. On the other hand, in the 1th group single, twin and triplet weight of lambs 4.89, 4.13 and 2.73 kg, in the 2nd group single and twin weights of lambs 4.96 and 4.17 kg and in the 3th group single, twin and triplet weights of lambs have been 4.76, 4.33 and 2.50 kg found respectively. Birth weights of single lambs have been significantly higher than multiple births weights of lambs (p<0.05). It can be said that the highest mating rate (p<0.05) has been obtained by the CIDR implementation to the sheep for 7 days, out of the mating season and a quite successful rate is provided when it is compared to external lambing in terms of pregnancy rates.