Infertility is a delay in conceiving. Unless we know the cause of the delay, how can we treat the problem? Investigations like doing an ultrasound, doing hormonal assay, doing a tubal evaluation either by HSG or by Laparoscopy, and then a male semen analysis will identify the causes. Ultrasound gives more details regarding the uterus and ovaries. These are the basic investigations that will help us identify the cause of infertility in 80 percent of the situations.