Investigations of embryonic and fetal losses of piglets of German Landrace sows
2008
Fischer, K.,Anhalt Univ. of Applied Science, Bernburg (Germany) | Bruessow, K.P.,Research Inst. of the Biology of Farm Animals, Dummerstorf (Germany) | Waehner, M.,Anhalt Univ. of Applied Science, Bernburg (Germany) | Bergfeld, U.,Saxon Inst. for Agriculture, Koellitsch (Germany)
Ninety-three German Landrace gilts were used in order to evaluate the relationship between the number of corpora lutea and embryonic and fetal development and losses. The investigations were carried out on day three of gestation (number of ovulated oocytes), on day 30 of gestation (end of embryonic development) and on day 80 of gestation (end of fetal development). Only 56.4% of detected oocytes were fertilized and intact. The amount of embryonic losses at day 30 of gestation was 36.9%. The amount of fetal losses was less than 1%. The number of embryos, but not the number of fetuses, increased with the number of corpora lutea. When the number of corpora lutea was 24 or more, embryonic losses were 63%. The best results were achieved in the group of 19-24 corpora lutea (40% of losses). The results of this experiment show that there is still a high potential in fertility that should be used.
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