One arm study:~Pregnant women are informed about the study at their first visit in Maternity care. Those that are interested in participating sign an informed consent, and book an appointment with a manual therapist. During the appointment five pain provocation tests are performed to the pelvic joints, and about 13 questions regarding previous low back pain, trauma to the pelvic, or pelvic pain during previous pregnancies, number of previous pregnancies, number of years with contraception, any presence of lactosis intolerance, profession, degree of physical exercises, gestational week, age, and BMI are asked by the therapist. Each participant is given a telephone call after delivery, to ask whether any pelvic pain ocurred or not, and whether sick-leave was necessary.
To perform clinical manual pain provocation tests of the pelvic joints in pain free pregnant women early in pregnancy, follow them until delivery, and compare those who develop PPGP with those who don't.