Year: 2016 | Month: December | Volume 6 | Issue 3

Effect of estrus synchronization by progesterone sponge along with PMSG on estrus response and fertility in Nellore Jodipi ewe lambs

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The present study was undertaken to evaluate the effect of synchronization by intra vaginal sponges containing 350 mg of progesterone for 12 days along with either 200 (Group I) or 300 (Group II) IU of PMSG at the time of sponge removal on estrus response and fertility in Nellore Jodipi ewe lambs. The percentage of exhibition of estrus, time of onset of estrus, duration of estrus and intensity of estrus were 80 and 85; 32.00±2.14 and 30.65±1.75 h; 23.19±1.50 and 23.59±1.28 h and 7.38±0.33 and 7.47±0.40 in Group I and II, respectively. All ewe lambs irrespective of estrus symptoms exhibition were inseminated twice intra cervically with fresh diluted semen at 48 and 54 h after sponge removal. The fertility rate based on 25 d non return rate was 75 and 80 % with an overall lambing rate of 50 and 65 % in Group I and II, respectively but the difference between the groups was not significant (P≥0.05).

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