Induced parturition in swine with prostaglandin F<SUB>2α</SUB>.
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概要
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The present study was attempted to induce the parturition in swine with prostaglandin F<SUB>2α</SUB> (PGF<SUB>2α</SUB>) and investigated its effects on lactation and reproductive performance.<BR>Eleven pregnant sows and gilts including Land race, Humpshire, Duroc and crossbred were injected intramuscularly with 10mg of PGF2a at 5 am on the day 110, 112, 113, and 114 of gestation (day 1=the last day of artificial insemination). Four control animals received 2ml of vehicle at the same time on the day 112 and 113.<BR>After the treatment of PGF<SUB>2α</SUB>, clinical observation was incessantly maintained to record the time of initial birth, interval between piglets, total farrowing time and dystocia etc.<BR>The mean time intervals (M±S.D.) from the injection to birth of the first piglet and total farrowing time (M±S.D.) in control and PGF<SUB>2α</SUB> treated animals were 58:25±17:17; 4:19±1:56 and 30:09±3:58; 4:59±4:06 hours, respectively.<BR>Mean gestation length (days) of PGF<SUB>2α</SUB> treated animals was clearly shorter than that of the controls.<BR>No significant differences between PGF<SUB>2α</SUB> treated and control animals were found in number and weight of live piglets at birth and weaning. Also, no harmful effects of PGF<SUB>2α</SUB> were noted with respect to lactation following the induced parturition.
- 日本繁殖生物学会の論文
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