Abstract: A method of increasing pregnancy rate in a female subject is provided, the female subject or an oocyte for introduction into the female subject being fertilized by a sperm from a male subject. The method includes the steps of administering to the male subject prior to fertilization: (i) an effective amount of an anti-oxidant agent; and (ii) an effective amount of an agent that reduces inflammation in the male reproductive tract and/or an effective amount of an agent that increases testicular testosterone concentration.