Induction of oestrus and ovulation by gonadotropin hormone in postweaning anestrus or delayed oestrus sows and anestrus gilts
1995
Duuangjai Punarriwatana | Chuanphis Phongsuraphunt | Chesta Pulpakdee | Wichai Tantasuparak | Mongkol Techakumphu (Chulalongkorn Univ., Bangkok (Thailand). Faculty of Veterinary Science. Dept of Pathology)
Gonadotropin hormones in form of 400 iu of PMSG+200 iu of HCG were given to anestrus or delayed oestrus sows after weaning and to anestrus replacement gilts (Landrace x Large White). The animals were divided into a treated group (sows, n=20 and gilts, n=17), and a control group (sows, n=5 and gilts, n=4). The control group was given an injection of 5 ml of Phosphate Buffer Saline. Oestrus was observed daily for ten days after injection. The interval between oestrus and injection and the conception rate at 21, 42 and 63 days were recorded. Eighty percent (16/20) of treated sows and eighty two point four percents (14/17) of treated gilts responded to the treatment while no oestrus was observed in the control groups. Approximately eighty percent of treated animal showed estrus within four to five days after injection. The conception rates of served sows and gilts was 100 percent (16/16) and 100 percent (13/13) at 21 days, 100 percent (16/16) and 92.3 percent (12/13) at 42 days, 87.5 (14-16) and 84.6 percent (11/13) at 63 days respectively. The study showed that gonadotropin could be used to solve the problem of anestrus in postweaning sows and replacement gilts.
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Эту запись предоставил Kasetsart University