Symphysis pubis dysfunction (SPD) is a condition that causes excessive movement of the pubic symphysis, either anterior or lateral, as well as associated pain, possibly because of a misalignment of the pelvis. Most commonly associated with pregnancy and childbirth, it is diagnosed in approximately 1 in 300 pregnancies, although some estimates of incidence are as high as 1 in 50.
SPD is associated with pelvic girdle pain and the names are often used interchangeably.
