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Field Experiences on Post-cervical Artificial Insemination in the Sow

Authors


Author's address (for correspondence): Dr G Bilkei, Bilkei Consulting, Bahnhofstrasse 4, 8600 Dübendorf, Switzerland. E-mail: bilkei.consulting@gmx.net

Contents

The present study was performed in order to evaluate the effects of post-cervical artificial insemination (post-CAI) in eastern European continental climate with multiparous sows. The sows were randomly allocated into two groups, and were AI by using CAI with 3 × 109 spermatozoa per dose (group 1, n = 859) or by post-CAI, using pooled semen with 1 × 109 spermatozoa per dose (group 2, n = 924). Wean-to-oestrus intervals, duration of oestrus, day 24 pregnancy rates, farrowing rates, and total pigs born were evaluated. Wean-to-oestrus intervals (CAI 114.3 ± 4.1 h; post-CAI 115.2 ± 5.2 h), duration of oestrus (CAI 64.1 ± 4.1 h; post-CAI 65.0 ± 5.2 h), day 24 pregnancy rates (CAI 90.2 ± 1.7%; post-CAI 89.3 ± 1.8%) and farrowing rates (CAI 88.1  ± 2.3%; post-CAI 87.8 ± 2.9%) did not differ significantly between CAI and post-CAI inseminated sows. The total number of pigs born differed significantly (p < 0.01) between the groups (CAI 12.3 ± 1.1; post-CAI 10.2 ± 0.9).

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