The Symphysis Pubis Dysfunction (NZSPDRG)

A small amount of movement at the symphysis pubis is normal, but in some women this joint may become unstable, causing too much movement in the pelvis. Because of the interconnected nature of the pelvic bones, instability at the symphysis pubis often also affects the sacroiliac joints, and vice versa.

The Symphysis Pubis Dysfunction, New Zealand Resource Group (SPDNZRG) was established by women who have experienced SPD, for women with SPD.

Abnormal functioning of the pelvic joints is called Symphysis Pubis Dysfunction, or SPD. It may also be known as osteitis pubis, pelvic girdle pain, pelvic instability, diastasis symphysis pubis and others. Symptoms of SPD can range from mild to severe and can similarly affect women’s physical, mental and emotional wellbeing.

The pelvis is a circular structure made up of three large bones: the sacrum (base of the spine) and the two large hip bones. These two bones are joined together at the front by cartilage and reinforcing ligaments which make up the symphysis pubis joint. At the back of the pelvis the hip bones attach to the sacrum at the sacro-iliac joints.

A small amount of movement at the symphysis pubis is normal, but during pregnancy the hormones relaxing and progesterone soften and stretch the ligaments of the pelvis to provide the flexibility needed for giving birth. In some women the symphysis pubis may become unstable, causing too much movement in the pelvis.

Because of the interconnected nature of the pelvic bones, instability at the symphysis pubis often also affects the sacro-iliac joints and vice versa. Abnormal functioning of the pelvic joints is called Symphysis Pubis Dysfunction (SPD) or Pelvic Instability. Some medical professionals consider that pregnancy hormones influence SPD, but this has not been definitely proven.