Scanning cows reveals ovulation from week 3 onwards post calving correlated with the calving to pregnancy interval
In a paper just published, showed that the interval from calving to pregnancy decreased as the interval from calving to 1st ovulation decreased. This pertained to cows scanned at 3, 4 and 5 weeks post calving. Caution should be exercised in that this experiment did not account for ovulations that took place from 10 to 17 days calved. Ovulation in this period can have a negative impact on involution rate and confounding effect on fertility.