The pubic symphysis is palpable. When standing, both hands can start from the navel, perpendicular to the ground down gradually touching, the first time to touch a relatively hard bone tissue, slightly hard pressure will be sore or painful feeling, this position is the position of the pubic symphysis. Pubococcygeal joint is composed of fibrous cartilage and ligaments, the role is to connect the two pubic bones, constituting the upper mouth of the pelvis, for the pelvic structure shock absorption, decompression, can make the pelvis tiny deformation, to cope with the occurrence of some special circumstances, for example, when women are pregnant and giving birth to the pubococcygeal joint is opened, increasing the size of the upper pelvic mouth, which is conducive to the output of the baby, or often have some sports or training people, when the pelvis is injured, it can play the role of increasing pelvic flexibility, and can be used to increase the pelvic flexibility. The pubic symphysis can increase the elasticity of the pelvis, so that the pelvis is not so easy to fracture. The pubic symphysis also protects the tissues within the pelvis, such as the ureter and bladder.