Field experiences on post-cervical artificial insemination in the sow.
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 x 10(9) spermatozoa per dose (group 1, n = 859) or by post-CAI, using pooled semen with 1 x 10(9) 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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Bilkei Consulting, Dübendorf, Switzerland.
Bilkei
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D000818:Animals; D002584:Cervix Uteri / Q000502:physiology*; D004971:Estrus / Q000502:physiology*; D005260:Female; D007315:Insemination, Artificial / Q000379:methods / Q000662:veterinary*; D008098:Litter Size; D008297:Male; D011247:Pregnancy; D011256:Pregnancy Outcome / Q000662:veterinary; D018873:Pregnancy Rate; D011897:Random Allocation; D013076:Sperm Count; D013094:Spermatozoa / Q000502:physiology; D013552:Swine / Q000502:physiology*; D013997:Time Factors; D014886:Weaning