snacks this is an overview of what it is!!

The two halves of your pelvis are connected at the front by a stiff joint called the symphysis pubis. This joint is strengthened by a dense network of ligaments which means that under normal conditions, very little movement occurs. In order to make your baby's passage through your pelvis as easy as possible, your body produces a hormone called relaxin, which softens the ligaments in your pelvis. As a result, these joints move more during and just after pregnancy.

We are not sure exactly what causes SPD but current thinking indicates that if one side of the pelvis moves more than the other when you walk or move your legs, this can lead to pain and inflammation at the symphysis pubis. X-rays and scans may not diagnose the problem as this rotation does not show up on most scans. Many women with SPD experience significant pain without any great separation of the joint -- the amount of pain isn't related to the degree of separation
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