Why do some people get pelvic girdle pain in pregnancy and not others?
There is no clear answer as to why many women develop pelvic girdle pain. It was traditionally thought that it was purely the pregnancy hormones especially relaxin that were the cause of pelvic girdle pain/symphysis pubis dysfunction(SPD) and this is still quoted as the reason on many pregnancy and baby websites. Other factors, such as differences in the way that the sacro iliac joints at the back of the pelvis move1 and differences in the way that the muscles are controlled have been shown to be important.
