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Data on the fertility of Simmental cattle in Serbia and the Vojvodina and on the weight and vitality of the calves



Data on the fertility of Simmental cattle in Serbia and the Vojvodina and on the weight and vitality of the calves



Vet. Glasn, 3: 11/12, 15-43



DATA were taken from the herdbook. The age at sexual maturity of Simuiental cows in Serbia and the Vojvodina averaged 21.62 mths. The interval between calving and subsequent conception usually averaged 106.1 days; after 1st calving it averaged 123.9 days and after the birth of twins 145 days. The interval was shortest after spring calving and longest after summer calving. 11.18% of the cows were infertile, and 2.13% of fertile cows aborted. 3.47% of all calves born were twins.

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