Twelve West African Dwarf bucks were used in this study to measure the effect of scrotal insulation and post insulation Proviron® treatment on semen. The testes of the bucks were insulated using cellophane bags and cotton wool for 30 days. After the removal of the insulating materials, the
bucks were divided into groups A and B. Animals in group A received 100mg per head per week of Proviron® (mesterolone) for 3 weeks while group B animals were left untreated. Semen collection was done using electroejaculation method throughout the study. Results showed that scrotal insulation caused testicular degeneration evidenced by an insignificant reduction (P>0.05) in sperm motility from 50.28±39.30% preinsulation to 41.81± 30.80% during insulation. However, motility increased significantly (P