Abstract
Summary The average gestation period for 116 Holstein-Galloway hybrid calves was 282.9 days. There was no significant difference between the average gestation period of the females and the average gestation period of the males. The average birth-weight for 109 hybrids composed of 52 males and 57 females was 87.9 pounds. The males averaged 91.0 pounds at birth and the females 85.0 pounds. The proportion of sexes for 116 Holstein-Galloway hybrids was 61 females to 55 males which is not statistically significant. The proportion of sexes varied in both directions when the ratios were determined with random numbers of the less than 116 head.
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