comparison between semen parameters of ejaculates collected via masturbation versus coitus interruptus

Proper collections of human ejaculates are necessary for semen analysis and infertilitytreatment purposes. the objective of this study was to assess the seminal characteristics ofejaculates collected by patients via masturbation and coitus interruptus. thirty individualsproduced one sample via masturbation and one via incomplete coitus during a 3-days interval.the semen parameters were compared and analyzed with student t-test and nemar test. theresults showed that mean values for progressive motility of spermatozoa were increased from46.81+15.7% to 58.76+13.5% in coitus interruptus and masturbation, respectively (p < 0.01).also, the mean values for normal sperm morphology was 54.03+25.1% in coitus interruptusand 63.36+13.4% in samples collected via masturbation (p < 0.01). in addition, spermconcentration was significantly improved in ejaculates collected with masturbation (p < 0.05).although, insignificant, the concentration of round cells were lower in specimens collectedvia masturbation than coitus interruptus. therefore, via masturbation method, better semencharacteristics were yielded which subsequently may improve the infertility treatmentoutcome.