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 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.