New research suggests that rectal palpation of dairy cows does not increase pregnancy loss, contrary to previous thought. According to three studies by Juan Romano, University of Minnesota veterinarian, early pregnancy diagnosis using the fetal membrane slip technique did not increase the proportion of pregnancy loss in pregnant females.

These studies featured one veterinarian performing the procedure, which closely resembles on-farm practices. Previous research demonstrating pregnancy loss featured multiple people using different techniques, or different techniques used in the same animal by several people, he says.