Gestational and health outcomes of dairy cows conceived by assisted reproductive technologies compared to artificial insemination

The mammalian preimplantation embryo: Its role in the environmental programming of postnatal health and performance

“…Interestingly, this study observed a slight improvement in services per conception in IVFderived cattle (Mullaart et al, 2021). In contrast, recent studies found that the interval from first service to conception (Lafontaine et al, 2023b) and the incidence of cystic ovarian follicles (Lafontaine et al, 2023a) was higher in IVF-derived cows compared to cattle produced by MOET and AI. However, it is not clear if the altered ovarian phenotype is a direct result of IVEP or the consequence of the high milk production expected in elite cows produced via IVF (Lafontaine et al, 2023a).…”

“…In contrast, recent studies found that the interval from first service to conception (Lafontaine et al, 2023b) and the incidence of cystic ovarian follicles (Lafontaine et al, 2023a) was higher in IVF-derived cows compared to cattle produced by MOET and AI. However, it is not clear if the altered ovarian phenotype is a direct result of IVEP or the consequence of the high milk production expected in elite cows produced via IVF (Lafontaine et al, 2023a). It is also relevant to consider that these retrospective studies rely on the analysis of reproductive variables that can be affected by farm management practices and technical issues (e.g., oestrous detection method, semen straws handling, etc.…”