SUMMARY The aim of this study was to prove the interest of injection of a synthetic analogue of PGF2qCloprostenol), in cows with retained placenta and
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Assiut Vet. Med. J. Vol. 52 No. 109 April 2006
whose are subject to manual deliverance. The study included 40 friesian cows breed, distributed on to 4 groups: (1) The first group, without treatment, (2) The 2nd group has been injected by saline (4 ml), the day of the delivery, (3) The 3rd group has been injected by PGF2a (4 ml, IM) the day of the delivery, (4) The 4th group has been injected twice by PGF2a (4 ml, IM): the day of the delivery and 15 days after. All cows were examined for uterine involution by rectal palpation on day 30 post partum. Afterwards they were re-examined 2-4 weeks later. The parameters used to measure subsequent reproductive performance were days to first service, days open, first service conception rate and conception rate. The history of each animal was observed up to next pregnancy when possible. Treatment of retained placenta with a single or two intramuscular injections of 500 mg Cloprostenol have a significant effect on reproductive performance in treated group 3 and 4, than in control groups (1 and 2). This significant effect was noted in reducing the interval frombirth to first mating, the interval from birth to conception and the number of service by conception. However, we have observed no significant effect between the group 3 and 4, for the same parameters of evaluation. However, a single injection of Cloprostenol at the moment of deliverance had a positive repercussion on the ulterior fertility and it's not necessary to repeat the treatment 15 days later.