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Effects of natural service and artificial insemination breeding systems on calving characteristics and weaning weights

A similar proportion of females exposed to estrous synchronization (ES) and artificial insemination (AI) became pregnant during the breeding season, compared with females mated during a natural service (NS) breeding system. Females in a breeding system that included ES and AI calved earlier in the calving season, compared with females mated with natural service, and a weaning weight advantage was observed in AI calves born within the first 21 days of the calving season, compared with NS calves born within the first 21 days of the calving season (3 pages).
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