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Observations on pregnancy duration, perinatal mortality and twinning in Holstein-Friesian X Polish Black-and-White Lowland and purebred Polish Black-and-White Lowland cattle



Observations on pregnancy duration, perinatal mortality and twinning in Holstein-Friesian X Polish Black-and-White Lowland and purebred Polish Black-and-White Lowland cattle



Medycyna Weterynaryjna 38(1-3): 85-88



For 3118 Holstein-Friesian X Polish Black-and-White Lowland (PBLW) and 1317 PBLW calves, the perinatal mortality was 7.44 and 6.54% resp. for the single-born calves and 15.2 and 22.2% for the twins. No significant differences were found between crossbreds and purebreds in pregnancy duration or perinatal mortality.

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Accession: 001104166

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