Ultrasonographic Monitoring of a Spontaneous Abortion in an Owl Monkey (Aotus nancymaae)

This case report describes the ultrasonographic findings during an idiopathic spontaneous abortion in an owl monkey. The female owl monkey presented for a transabdominal ultrasonogram to evaluate her pregnancy. This evaluation is a routine monitoring procedure in our owl monkey breeding colony. Although the fetus and placenta appeared normal at the initial scan, no fetal heartbeat could be detected. We followed the abortion with serial ultrasonographic scans and documented complete involution of the uterus post-abortion.