Y yo creo que no has leído el artículo que has puesto y te has quedado con lo que te ha dado la gana. Te pongo la introducción:
Introduction: 50 to 80% of pregnant women suffer from low back pain (LBP) or pelvic pain (Sabino und Grauer, 2008). There is evidence for the effectiveness of manual therapy like osteopathy, chiropractic and physiotherapy in pregnant women with LBP or pelvic pain (Liccardione et al., 2010). Anatomical, functional and neural connections support the relationship between intrapelvic dysfunctions and lumbar and pelvic pain (Kanakaris et al., 2011). Strain, pressure and stretch of visceral and parietal peritoneum, bladder, urethra, rectum and fascial tissue can result in pain and secondary in muscle spasm. Visceral mobility, especially of the uterus and rectum, can induce tension on the inferior hypogastric plexus, which may influence its function. Thus, stretching the broad ligament of the uterus and the intrapelvic fascia tissue during pregnancy can reinforce the influence of the inferior hypogastric plexus. Based on above facts an additional intravaginal treatment seems to be a considerable approach in the treatment of low back pain in pregnant women.