The female pelvis is the bony connection between the trunk and the lower limbs and is an important organ that supports the trunk and protects the pelvic organs. It is also the bony birth canal through which the fetus is delivered, so there is laxity of the articular ligaments in late pregnancy to allow the fetus to pass through the pelvis more smoothly. Some pregnant women experience separation of the pubic bone and painful pubic bone in late pregnancy and just after delivery. The specific location of the pubic bone is directly in front of the pelvis, that is, in the location covered by pubic hair, and the flat bony location that can be felt in front is the female pubic bone. Some women can feel a gap between the pubic bones on both sides of the pelvis in late pregnancy or even after childbirth, and in most cases this is where the pubic bone separates. When the pubic bone is separated, women will experience pelvic instability, and when there is a change in position, such as from lying to sitting or from sitting to upright position, pain will occur in the pubic area due to pelvic instability.