Association of transition cow health with pregnancy per artificial insemination and pregnancy loss in Holstein cows submitted to a Double-Ovsynch protocol for first service

Summary: This observational study was conducted to evaluate the effect of transition cow health on pregnancy per artificial insemination (P/AI) and pregnancy loss in cows submitted to a Double-Ovsynch protocol for first service. There was a negative association of inflammatory disorders (i.e., retained fetal membranes, metritis, mastitis) and P/AI in cows submitted to a Double-Ovsynch protocol for first service. Metabolic disorders (i.e., milk fever, ketosis, left displaced abomasum) were negatively associated with P/AI only in multiparous cows. Regarding pregnancy loss, only uterine-related disorders (i.e., retained fetal membranes and metritis) were negatively associated, irrespective of parity. These results highlight the importance of transition cow health as a prerequisite for achieving high fertility in cows submitted to a Double-Ovsynch protocol for first service.