Reproductive performance of weaned sows after single fixed-time artificial insemination under a tropical climate: Influences of season and insemination technique

Factors influencing pre‐ovulatory follicle diameter and weaning‐to‐ovulation interval in spontaneously ovulating sows in tropical environment

“…Likewise, the backfat loss in sows during the weaning-to-oestrous interval in the hot season was also higher than the cool season (8.8% vs. 6.0%) (Pearodwong et al, 2020). These findings indicate a close relationship between backfat thickness at weaning and/ or backfat changes during the follicular phase and the subsequent reproductive performance of sows.…”

“…This finding was more pronounced in primiparous sows with low backfat thickness at weaning (Figures 1 and 3). (Pearodwong et al, 2020). It was found that the proportion of sows losing more than 10% of backfat during the weaning-to-oestrous interval in the hot season was higher than in the cool season (5.9 vs. 0.6%, respectively) (Pearodwong et al, 2020).…”

“…For instance, since boar semen has an optimal fertility window during the 0–24 hr post‐service, single fixed‐timed‐insemination of sows with delayed ovulation results in a decrease in viable spermatozoa at the time of ovulation. A previous study reported that litter size at birth was decreased (−1.2 piglets per litter) when sows with poor backfat thickness were single fixed‐timed‐inseminated in the hot season (Pearodwong et al., 2020). It was found that the proportion of sows losing more than 10% of backfat during the weaning‐to‐oestrous interval in the hot season was higher than in the cool season (5.9 vs. 0.6%, respectively) (Pearodwong et al., 2020).…”

“…A previous study reported that litter size at birth was decreased (−1.2 piglets per litter) when sows with poor backfat thickness were single fixed‐timed‐inseminated in the hot season (Pearodwong et al., 2020). It was found that the proportion of sows losing more than 10% of backfat during the weaning‐to‐oestrous interval in the hot season was higher than in the cool season (5.9 vs. 0.6%, respectively) (Pearodwong et al., 2020). Likewise, the backfat loss in sows during the weaning‐to‐oestrous interval in the hot season was also higher than the cool season (8.8% vs. 6.0%) (Pearodwong et al., 2020).…”

“…It was found that the proportion of sows losing more than 10% of backfat during the weaning‐to‐oestrous interval in the hot season was higher than in the cool season (5.9 vs. 0.6%, respectively) (Pearodwong et al., 2020). Likewise, the backfat loss in sows during the weaning‐to‐oestrous interval in the hot season was also higher than the cool season (8.8% vs. 6.0%) (Pearodwong et al., 2020). These findings indicate a close relationship between backfat thickness at weaning and/or backfat changes during the follicular phase and the subsequent reproductive performance of sows.…”