Study on the effect of cloprostenol(PGF2a)on simultaneous delivery of sows

Xu Jialing; Ji Hongqin; Zhang Wenjing; Wang Zhongshun; Meng Lingnan

Abstract：The aim of the experiment was to investigate the effect of PGF2a on inducing simultaneous delivery of sows.A total of 112 Landrace sows were randomly divided into two groups with four replicates in each group and 14 sows in each replicate.The sows in experimental group injected PGF2a on 113～114 d of the expected perinatal period,while sows in control group underwent natural delivery without injection.The results showed that sows in the experimental group completed full delivery within only 3 d,while the control group lasted for 10 d.The daytime delivery rate of sows in the experimental group was 53.51％,and that in the control group was 26.79％,and the daytime delivery rate in the experimental group was 99.74％higher than that in control group(P＜0.05).Compared with control group,there were no significant differences in the number of live births,number of stillbirths,number of mummies and labor course in the experimental group(P＞0.05),but the weaning litter weight and average daily gain of piglets in the experimental group were extremely higher than those in the control group(P＜0.01).The study indicates that using PGF2a to induce sow delivery can enable sows to perform centralized delivery during the day,shorten the duration of delivery,reduce non-productive days,promote the growth and development rate of piglets,and shorten the weaning days.