There is currently a lack of evidence to suggest that antibiotics delivered into the uterus post-service improves pregnancy rates. The evidence does support that post-service treatment with or without antibiotics improves pregnancy rates in mares with endometritis compared to no treatment (pregnancy rates between 40-90% compared to 0-56% respectively). The studies further identify the need to recognise mares at risk of post-service endometritis to target appropriate therapy.
