The detection and monitoring of early pregnancy in the vervet monkey (Cercopithecus aethiops) with the use of ultrasound and correlation with reproductive steroid hormones.

Reports on the diagnosis and monitoring of twenty early pregnancies in vervet monkeys (Cercopithecus aethiops) by ultrasonography. Gestational cavity of two millimeters as the first definite sign of pregnancy; Relation between the features and plasma steroid concentrations and profiles; Benefits of results to breeding management and reproductive research.