KARI LANET Research Projects – Centre Research Advisory Committee (CRAC) 2003

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2003
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Kenya Agricultural Research Institute
Abstract
Reproductive wastage is caused by both genetic and environmental factors resulting in production losses of cattle. Among the factors of importance are uterine factors, age of cow, stress, infection, rectal palpation amongst others. Progesterone levels (P4) in milk or Pregnancy Specific Protein B (PSPB) in peripheral blood can detect the lack of a conceptus, which may be due to non-fertilization or loss of the embryo if fertilization took place. Embryonic mortality has been reported of the order of 38% of all open cows (Sreenan and Diskin, 1986) and occurs from day 14 to 60 after insemination. An extended luteal phase 25 days after insemination as indicated by P4 levels shows that the cow is pregnant and any drop indicates that the conceptus has been lost.
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