Infertility:Treatment of male infertility: is it effective? Review and meta-analyses of published randomized controlled trials

There are few widely accepted treatments for male subfertility. Controlled trials are necessary to evaluate different subfertility treatments because pregnancies and spontaneous improvements in semen parameters occur without treatment. Properly randomized trials can find out whether pregnancy rates are higher or lower than expected after treatment. Quantitative meta-analysis improves precision where individual trials are not powerful enough to …