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The Thai Journal of Veterinary Medicine

Abstract

The present study was performed to investigate the in vivo fertility of frozen-thawed (FT) boar semen after intra-uterine (IUI) and deep intra-uterine insemination (DIUI) in spontaneously-ovulating sows. A total of 48 weaned sows were included. The sows were divided into three groups, i.e. natural mating (NM) (n=30), IUI (n=9) and DIUI (n=9). In the IUI and DIUI groups, the sows were inseminated twice, at 24 and 36 h after the detection of oestrous by IUI with 2x109 spermatozoa/dose or DIUI with 1x109 spermatozoa/dose. Transrectal ultrasonography was used to determine the time of ovulation after insemination. The results revealed that the conception as determined by a 24- day non-return rate of the sows was 96.6%, 88.8% and 66.6% (p=0.03) and the farrowing rate (FR) was 96.6%, 66.6% and 66.6% (p=0.01) in NM, IUI and DIUI groups, respectively. The numbers of total piglets born per litter were 9.4±2.8, 11.3±2.9 and 7.6±3.1 piglets in the NM, IUI and DIUI groups, respectively (p=0.10). These data indicate that the spontaneously-ovulating weaned sows inseminated with either IUI or DIUI using a relatively low numbers of FT spermatozoa resulted in a lower FR compared to NM. The total number of piglets born per litter after IUI was higher than DIUI.

Publisher

Faculty of Veterinary Science, Chulalongkorn University

First Page

215

Last Page

219

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