Recovery of optimum number of good quality of spermatozoa is an important component of In Vitro Fertilisation (IVF). This is
achieved by sperm preparation methods involving separation and recovery of capacitated sperms. Double Wash Swim-up
(DWSU) and Double Density Gradient Swim-up (DDGSU) are two most accepted methods. Cochrane systematic review (2007)
finds no clear benefit of one method over the other in Intrauterine Insemination (IUI). Systematic review on effectiveness of
these preparations in IVF is lacking. Effectiveness is generally assessed in terms recovery rates of the sperms. Capability of
successful fertilisation of good...