Viagra has not been proven to affect male fertility. There are no medical studies that show Viagra helps male fertility or has the ability to modify sperm count. Viagra can improve your ability to have and maintain an erection, which does help your ability to have intercourse. However, if you have been trying for more than 1 year with your partner to conceive without success, an appointment with your urologist is recommended to explore male factor infertility7 (Burger et al. 2000. International Journal of Impotence).