Role of Hormones in Reproduction Management of Swine
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Date
1996
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Birsa Agricultural University, Ranchi
Abstract
1.Synchronized farrowing during day time on working days was possible either through intramuscular route (PG 5 mg) or IVSM route with a considerable low (1mg) dose of PG.
11. Termination of pregnancy with PG (day 111) revealed no adverse effect on piglet size or weight at birth.
111. Induced farrowed sows recorded significantly shorter weaning to fertile estrus interval.
iv. Addition of oxytocin or EV to PG (5 mg) resulted in more precise farrowing (LWY) by shortening induction interval.
V. Post parturient PG treatment (LWY) significantly increased piglet survivability and weight gain.
Significantly shorter weaning to fertile estrus interval was recorded in the treated pigs.
vi. The piglet born out of PG treated mother weaned at day 40, 45 or 50 consistently showed higher body weight than control.
Vii .Application of PMSG (500 IU) alone or in combination with HCG (500 IU) at 24 hrs of weaning resulted in a significantly earlier post weaning estrus with higher CR than control.
viii. Administration of HCG to sows at day 12 of service had a significant increase on piglet weight at birth.