The primary problem is a failure of dairy producers to detect estrus in those cows that should be showing estrus. The underlying reason is insufficient time devoted to estrous detection. In most studies, the majority of cows show estrus after treatment with prostaglandin. Our observations are that the managers who give reproductive efficiency high priority find a greater number of cows showing synchronized estrus than other managers. In addition, cows with good uterine tone are more likely to exhibit a synchronized estrus than cows with poor uterine tone.
Examination is necessary to determine reproductive status of the ovaries and uterus.
Make observations when cows are not being distracted by feeding or other activities. Allot sufficient time and people to do the job right. Finally, don't expect miracles. If the animals are not receiving adequate nutrition, are in unthrifty condition or have health problems, responses will be poor.