Factors associated with early and mid-to-late fetal loss in lactating and nonlactating Holstein cattle in a hot climate.
作者： F. D. Jousan , M. Drost , P. J. Hansen
关键词:
摘要: The purpose of this study was to evaluate associations lactation, somatic cell count score (SCCS) at breeding, milk yield, lactation number, interval from calving breeding (days open), number times inseminated, and season on fetal loss for lactating Holstein females (both first-parity multiparous cows) nonlactating heifers in a hot climate. Females were palpated between d 40 50 gestation again 70 80 determine pregnancy status. Early defined as that occurred after but before 80. Mid-to-late represented losses expected calving. Lactating had higher early (P = 0.055) mid-to-late < 0.05) than heifers. Those with increased days open experienced greater 0.055), whereas an elevated SCCS encountered 0.01). Milk not associated or loss. For heifers, there no season, age In conclusion, more likely suffer Also, related ability maintain pregnancy, relationships season.
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