An inverted, or retroverted, uterus is a genetic condition affecting around 20% of women whereby the uterus tips backwards (towards the spinal chord) as opposed the usual ‘straight up’ or slightly forward tilted uterus. The condition is nothing to be concerned about and, for the most part, it causes very little hassle. The few times it will cause some trouble is in childbirth. Intercourse can often be quite painful because the uterus is pushed slightly backwards and collides with the spine. Many people think that having a retroverted uterus will cause fertility difficulties but this only occurs in very few cases; the majority of people experience no difficulty in conceiving a child (aside from some pain during intercourse). Indeed, the reverse is often true – some fertility problems in themselves cause the uterus to become inverted; endometriosis being one such example.
One other way in which a uterus can become inverted is during the pregnancy. When the child is growing the uterus expands in order to provide it with more space to develop. This places a large strain on many of the ligaments that surround the uterus. When there is a large strain on the ligaments there is a possibility that they will weaken to a certain extent. However, this weakening is not even so some sides of the uterus become less well supported than others. After the birth, the uterus shrinks once more but the ligaments on one side are weaker causing it to ‘slip’ backwards. This causes the uterus to become inverted.