A short versus a long time interval between semen collection and intrauterine insemination: a randomized controlled clinical trial.

Study Question: Does a short interval (i.e. ≤90 min), compared to a long interval (i.

Pregnancy rate is significantly higher in in vitro fertilization procedure with spermatozoa isolated from nonliquefying semen in which liquefaction is induced by alpha-amylase.

In 115 patients (group I) in which normal liquefaction of semen occurred, the fertilization rate of the yielded oocytes was 71.2% after standard in vitro fertilization procedure, and the viable pregnancy rate per patient per cycle was 13.0%.