title: Embryonic survival in the pig after insemination with antigen-enriched semen.
abstract: Ninety-two first-litter Dutch Landrace sows were inseminated at their first oestrus after weaning with diluted semen containing 2.3 x 10(9) motile sperm cells. Immediately before insemination of 46 randomly chosen sows, 2 x 10(8) fresh bovine leucocytes were added to the semen. All sows were slaughtered on Day 8, 9, or 10 after insemination. In the control group and leucocyte-treated group respectively, 41 and 39 sows were pregnant at slaughter. The average number of corpora lutea (+/- SEM) in pregnant animals was 15.72 +/- 0.60 and 15.22 +/- 0.61, respectively. The average number of embryos was 10.66 +/- 0.79 and 10.36 +/- 0.80, respectively. The addition of bovine leucocytes to semen had neither influence on the pregnancy rate, nor on the number of embryos during early pregnancy.
authors.affiliation: Department of Animal Husbandry, Agricultural University, Postbox 338, 6700 PH Wageningen, The Netherlands.
authors.forename: T
authors.initials: T
authors.lastname: van der Lende
authors.forename: R
authors.initials: R
authors.lastname: Donker
authors.forename: W
authors.initials: W
authors.lastname: Hazeleger