Fungal endometritis associated with embryonic loss in a maiden mare

Fungal endometritis and placentitis have been reported as a rare but important cause of infertility in the mare. There are no reported clinical cases of fungal endometritis causing embryonic loss in the mare. This case report aims to highlight the potential of fungal endometritis as an aetiological agent in embryonic loss in the mare; an incidental diagnosis of a case of fungal endometritis and embryonic loss while undertaking routine pregnancy assessments in a Standardbred mare. After a positive pregnancy diagnosis after 13 days post-ovulation, a mare was diagnosed with endometritis and pregnancy loss associated with the growth of an unusual fungus, likely of the Acremonium spp., 28 days post-ovulation. While fungal embryonic loss is rare, it should be considered a potential reason for pregnancy wastage in the mare.