IVF has changed the prospects in the female. IVF involves retrieving eggs from the ovaries by Trans vaginal aspiration and incubating the sperms in a dish resulting in formation of enbryos which are then transferred in to the uterine cavity. IVF has proven to be effective for Tubal factors (PID) endometriosis etc. For IVF to be successful we require more than 100,000 actively motile sperms for each egg. Many infertile male's do not fulfill this criteria . IVF cannot be used for severe male factor infertility and for those cases where the sperms are retrieved from the testis or epididymis.