Objective:To explore into the effectiveness of a split ejaculate method on the improvement of progressive sperm recovery in human spermatozoa selection technology.Methods:Forty oligoasthenospermia were randomized into two groups:complete semen group(n=20)and part semen group(n=20).The length of abstinence was 4-5d.Semen was obtained by masturbation,and sperm selection was performed respectively using swimming up technique.The density and motility of sperm,the rate of progressive sperm and its recovery after...