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Tests of Applicability of the Oestrophan Inj Spofa Preparation to Affect Reproductive Parameters of Sows After Piglet Weaning

NAVRATIL S, KNOTEK Z, MANASKOVA M, MARTINEK J, STEFAN M, SOUKUP T, SOUKUPOVA I
Veterinarni Medicina 37, 1992, 509-516

Cloprostenol, a prostaglandin F2-alpha analogue, used in the Czechoslovak preparation Oestrophan ing. Spofa was tested by a new nontraditional use. The effect of cloprostenol use on reproductive parameters of sows after piglet weaning was followed in a set of 458 experimental and 434 control sows. The effect of single intramuscular instillation of cloprostenol was tested in five partial observations: to multiparous sows at a dose of 175 mug on the day of weaning [experimental group no. 1 ], on day 1 after weaning [group no. 2], 500 mug oil day 1 after weaning [group no. 3], to primiparous sows at a dose of 500 mug on day 1 after weaning [group no. 4]. The treatment used in group no. 4 was also applied to 42 primiparous sows kept on a farm with regular occurrence of post-weaning anoestria of sows (experimental group no. 5). These parameters were evaluted: dynamics of oestrus onset within five, and/or ten, days after weaning, average length of the weaning - first insemination interval, conception rate after the first insemination in dependence on terminated deliveries and parameters of piglet litter. Cloprostenol application did not have a statistically significant effect on the evaluated reproductive parameters. The percentage of multiparous, and/or primiparous, sows in which the oestrus onset was not detected by the 10th day after weaning, did not show any large differences in the various experimental and control groups [17.09 vs. 16.55 %, 23.53 vs. 32.56 %, 13.66 vs. 16.13 %, 29.54 vs. 30.30 %


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