The purpose of this study is to determine the prevalence of low back and pelvic pain in Spanish pregnant women. The results should allow for the identification of factors associated with a greater risk of having it during pregnancy. Once risk factors are identified, other studies can assess the effectiveness of measures to reduce this pain.

Validated methods were used to gather data on the prevalence of LBP, LP and PGP, anthropometric and socio-demographic characteristics, history of LBP, obstetrical history, physical activity before and during pregnancy, mattress and sleep characteristics, disability, anxiety, and depression. Separate multiple logistic regression models were developed to identify the variables associated with LBP, LP and PGP.

Inclusion Criteria:

• A pregnancy of 28 weeks or more
• Able to understand, read and write Spanish
• Seen at participating health centers or hospitals in the study
• Signs informed consent form

Exclusion Criteria:

• Refusal to participate in the study
• Being under 18 years of age or legally mentally incapacitated
• Having a diagnosis of illnesses that can cause back pain

Pregnant women who are 28 weeks pregnant or more (in the third trimester of the pregnancy).