The patients in the intervention group will receive, in addition to the prenatal educational content, the 12 PNE lessons in audiovisual format. Each lesson will last between 10-15 minutes. The contents of PNE will be an adaptation, focused on the context of a pregnant woman, of the Butler & Moseley postulates. These contents have already been previously adapted according to the nature of the patients' pain, both in chronic pain and in acute pain. In summary, the participants will receive a detailed explanation about the biopsychosocial component of pain through the use of diagrams, metaphors and practical examples. In turn, the objectives of this program could be summarized as: (1) Reformulate erroneous beliefs about pain, (2) Inform about the biology and protective nature of pain and (3) Provide techniques to reduce kinesiophobia and, consequently, promote physical activity, with the beneficial effect it entails for patients with pain.

Patients assigned to the PE group will receive different content on standard PE based on the Pregnancy and Postpartum Clinical Practice Guide, consisting of general information about pregnancy (visits and monitoring of pregnancy, diet, phases of delivery, lactation, etc.), as well as specific recommendations for lumbopelvic pain associated with pregnancy. These contents will be developed by midwives from the participating hospitals. Participants will receive 12 educational sessions, with an estimated duration of 10 minutes each.

The patients in the intervention group will receive, in addition to the prenatal educational content, the 12 Pain neuroscience education lessons in audiovisual format. Each lesson will last between 10-15 minutes. The contents of PNE will be an adaptation, focused on the context of a pregnant woman, of the Butler & Moseley postulates. These contents have already been previously adapted according to the nature of the patients' pain, both in chronic pain and in acute pain. In summary, the participants will receive a detailed explanation about the biopsychosocial component of pain through the use of diagrams, metaphors and practical examples. In turn, the objectives of this program could be summarized as: (1) Reformulate erroneous beliefs about pain, (2) Inform about the biology and protective nature of pain and (3) Provide techniques to reduce kinesiophobia and, consequently, promote physical activity, with the beneficial effect it entails for patients with pain.

The primary outcome will be mean pain intensity over the previous week assessed using an 11-point numerical rating scale (range, 0 [no pain] to 10 [worst pain imaginable]).

The Roland Morris questionnaire will be used. This is a validated questionnaire for the Spanish population and has previously been used in women with lumbopelvic pain. The questionnaire assesses the degree of physical disability in patients with non-specific low back pain and is made up of 24 items that describe daily activities that may be difficult to perform due to low back pain. A point is added to each item marked "yes", and a maximum score of 24 points can be obtained. The greater the number of positive responses, the greater the disability.