O66: Other obstructed labour

O66.2: Obstructed labour due to unusually large fetus

In the pelvis there are various pelvic bones. At the back of the body the pelvic bones are connected to the sacrum of the spinal column. There is a joint on either side of the sacrum for this purpose. The pelvic bones plus the sacrum form the bony pelvic ring or girdle. In front, the pelvic bones are tightly joined to one another by ligaments and cartilage fiber.

There are different levels within the pelvis. During the birth the child must pass through the different levels. For the child’s body to pass through the various stages, it has to turn at different points. If a child is unusually big, it can cause problems. It can make the birth take longer than usual. It may also be the case that the child cannot then be born in the usual way, but that a Caesarean is required.