My daughter has had three miscarriages and they are sending her for one of these tests. All the other tests say she is OK and they can find no reason why she keeps losing her babies. An HSG is used to look for physical barriers that may be causing a miscarriage, something that could prevent the progress of a healthy pregnancy. The uterine cavity is usually smooth and as the pregnancy grows, the uterus grows.
Some women have fibroids inside the cavity of the uterus, known as submucosal fibroids.
For most women these cause no problems at all, but in some cases they are linked to miscarriages. A fibroid is a hard ball of smooth muscle cells and a submucosal fibroid can thin out the lining of the uterus and decrease the blood supply to the developing embryo. The pregnancy cannot develop normally and this may lead to a miscarriage. Repetitive miscarriages can also occur if the uterus has an abnormal shape. A normal uterus is shaped like a small pear turned upside down.