Most, if not all couples expect to have their own babies once they get married. Many women naively believe that they will get pregnant the very first month they try to do, and become concerned when a pregnancy does not occur.

Before beginning to get worried one should remember that in a single menstrual cycle the chance of a perfectly normal couple achieving a successful pregnancy is only 25%, The time factor is added because observed and estimated studies in the number of month required for conception in the absence of the use of contraception clearly indicate that.