A retrospective analysis of the effect of prostaglandin F2a on conception rates in commercial dairy herds.
The objective of this retrospective analysis was to determine the effect of prostaglandin F2a (PGF2a) on conception rates in commercial dairy herds. During routine herd visits, cows were selected for palpation if they had been milking for at least 60 days and had not been observed in estrus, or if they had been inseminated at least 30 days prior to the study selection. Nonpregnant cows with a palpable corpus luteum of sufficient size were injected with PGF2a. The herdsmen were instructed to inseminate animals within 6 to 12 hours after the observed estrus. The insemination rate within 6 days of treatment was 77.6%. The conception rate for the treated animals (47.9%) was statistically the same as that for the nontreated controls (47.2%).
Strelow
L W
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Animal Health Management P.C. 12735 Route 26N Orangeville, IL 61060 USA.