We have 3D ultrasound, which is useful for fertility investigation. Canadian research has shown that approximately 30 percent of women trying to conceive have a uterine malformation or a variation in the shape of the uterus. Most of these don't cause problems. However, some of these are associated with difficulties in conceiving and with miscarriage. Having a 3D ultrasound is especially important if there is a history of miscarriages.