Hello, I have gone through your query and understood the concern. There are several causes for failure of conception. For the male part, the sperm count, progressive motility and liquefaction are important. For the female part, regular ovulation, proper tubal and uterine function, absence of anti-sperm antibodies are important. Intercourse should be done at least on alternate days around ovulation, i.e., two weeks prior to the onset of the next menstrual cycle. If your wife has a retroverted uterus, lying on the stomach for sometime after the intercourse will help to retain the sperm longer. Alternatively, placing a pillow beneath the hip region may also be tried if there is a spillage of semen. You can get further help from a specialist. Take care.