A number of medicinal plants have been found to influence the level of reproductive hormones and thus affect fertility in the overall. This work evaluated the effects of ethanol leaf extracts of A. gangetica and A. vogelli respectively on some reproductive system parameters in male Wistar rats. A total of sixteen (16) male albino rats were grouped into four (four rats in each group): group A served as normal control, group B received Immunace (Vitabiotics) group C and D received 400 mg/kg body weight of A. gangetica and A. vogelli extracts respectively. Extracts were administered orally to rats for 21 days, after which they were sacrificed by cervical dislocations and blood samples drawn by cardiac puncture. The effect of the extracts on testosterone, follicle stimulating hormone, luteinizing hormone and semen analysis of the test rats were determined using enzyme linked immunosorbent assay (ELISA) and standard techniques. Data collected were analyzed using Graph pad prism V6 and p values < 0.05 were adopted as significant. There was no significant (p>0.05) change in testosterone, FSH and luteinizing hormones in the group administered A. gangetica plant extract relative to the control. There was also no visible difference in the testes weight and sperm morphology relative to the control group. In contrast, administration of A. vogelli extract caused significant (p<0.05) decrease in testosterone and follicle stimulating hormone concentrations from: 1.12 ± 0.20 to 0.89 ± 0.05 and 1.41 ± 0.07 to 1.35 ± 0.12 respectively relative to the control group. While significant (p<0.05) decrease in luteinizing hormone (1.71 ± 0.15) was observed relative to the standard drug group (1.76 ± 0.05). A significant (p<0.05) decrease in sperm count and testes weight was also observed in rats treated with A. vogelli extract relative to the normal control.The results suggest that, A. vogelli extract may cause decreased fertility in male albino rats and could be developed further into potent male contraceptives. A. gangetica on the other hand, had no effect on male reproductive hormones.