Testis histology and sperm parameters were used to evaluate the antispermatogenic effect of Leptadenia hastata aqueous extract in male Wistar rats. 100, 200, 400 and 800 mg kg-' of Leptadenia hastata aqueous extracts were orally administered during 60 consecutive days. L. hastata aqueous extract did not have significant (p>0.05) effect on body, testis and epididymis weights. Testes histology of rats treated with the plant extract showed the decrease of Leydig cells number and the spermatogenesis was been influenced with high doses of L. hastata aqueous extracts. Some sperm parameters as path velocity, progressive velocity, straightness, linearity and motility of spermatozoa were been significantly (p<0.05) decreased. The treated rats with the different amount of L. hastata aqueous extracts showed a significant (p<0.01) reduction in the number of sperm in the testis and the cauda epididymis. Even if it's not significant, the extract showed a decrease of testes, epididymis weights and a rarity of Leydig cells. These results confirm
the antiandrogenic effect of L. hastata and the claims of breeders that the consumption of the l e a v e s of L. H a s t a t a r e d u c e d t h e fertility of t h e i r a n i m a l s .

Leptadenia hastata, antispermatogenic, testis histology, sperm motility, sperm p a r a m e t e r s