ESTROUS AND FERTILITY RESPONSE IN ESTROUS SYNCHRONIZED LWY CROSSBRED PREPUBERTAL GILTS

Abstract

This study was undertaken to assess estrus and fertility response in LWY Gilts synchronized with Prostaglandin
5 mg, Prostaglandin 7.5 mg, PMSG 400 IU+HCG 200 IU and 5 ml of Normal Saline in LWY crossbred gilts during
summer and winter seasons. The mean estrus during winter and summer seasons was 100, 83.33, 83.33 and 66.67
percent and 66.67, 66.67, 66.67 and 50.00 percent, respectively. The difference in the interval between treatment
and onset of estrus and the intensity of estrus between seasons and between protocols in each season were significant
(P<0.05) with the earlier onset of estrus and intensity in gilts synchronized by PMSG 400 IU+HCG 200 IU in both the
seasons. The difference in the duration of estrus and litter size between seasons and between protocols in each
season were not significant but the duration of estrus was longest in PMSG 400 IU+HCG 200 IU synchronized gilts
during winter season and in normal saline synchronized gilts during summer season. While, the intensity of the estrus
was highest in PMSG 400 IU+HCG 200 IU and PG 5 mg protocols synchronized gilts in winter season and in PMSG
400 IU+HCG 200 IU protocol during summer season.