Advertisement

What causes sacroiliac joint pain during pregnancy?

Rick Olderman
Physical Therapy
Sacroiliac (SI) joint pain or dysfunction is a common diagnosis. The pelvis is subject to unequal forces acting on it by the tensor fascia lata (TFL) and quadriceps muscles, and the pelvic bones are more mobile than usual during pregnancy. This may play out at the SI joint. One ilia is being pulled forward more than the other by these muscles, which cause pain in the back of the pelvis.

During the latter months of pregnancy, the ligaments holding the three bones of the pelvis together often become lax due to the hormone relaxin. This allows the ligaments to become ever-so-slightly looser and can cause pelvic pain that is sometimes diagnosed as SI joint pain. This can happen on one or both sides.
Fixing You: Back Pain During Pregnancy: Self-treatment for sciatica, back pain, SI Joint or pelvic pain, and advice for abdominal strengthening post partum.

More About this Book

Fixing You: Back Pain During Pregnancy: Self-treatment for sciatica, back pain, SI Joint or pelvic pain, and advice for abdominal strengthening post partum.

Changes happen during pregnancy that not only lead to back pain during pregnancy but also afterward. Many of these changes affect the shape of the spine and tilt of the pelvis. Both of these...

Continue Learning about Pregnancy, Fertility and Childbirth

Are Hormones Taking Your Eyes for a Ride?
Are Hormones Taking Your Eyes for a Ride?
You might not think about how your hormones affect your eyes and vision, but they do throughout your life. "Hormones definitely affect your eyes from...
Read More
What is twin-to-twin transfusion syndrome?
Dr. Jeanne Morrison, PhDDr. Jeanne Morrison, PhD
Twin to twin transfusion syndrome (TTTS) is an abnormality of the placental vasculature during pregn...
More Answers
Should You Hire a Doula? 10 Things to Keep in Mind
Should You Hire a Doula? 10 Things to Keep in MindShould You Hire a Doula? 10 Things to Keep in MindShould You Hire a Doula? 10 Things to Keep in MindShould You Hire a Doula? 10 Things to Keep in Mind
Though only six percent of women hire them to help with pregnancy, doulas offer real benefits.
Start Slideshow
What Should I Avoid During Pregnancy?
What Should I Avoid During Pregnancy?

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.