how can we increse the Number of sperm in our body?

we feel unhealthy after sex with wife and want to a child,so pl tell me what remedies we should use to increase the no. of sperms for both.one year has to gone of my marriege but no result till now.we have already consulted to a docter,he said that my wife sperm is not strong and it can be increase by medicines/remedies.
so pl advice me…

women produces eggs and men produces sperms. only one sperm is enough for the fertilization.