IMR Press / CEOG / Volume 45 / Issue 5 / DOI: 10.12891/ceog3964.2018

Clinical and Experimental Obstetrics & Gynecology (CEOG) is published by IMR Press from Volume 47 Issue 1 (2020). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on as a courtesy and upon agreement with S.O.G.

Original Research
Postpartum radiographic changes in pelvic morphology and its relation with symptoms of pregnancy-related symphysis pain
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1 Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
2 School of Science for Open and Environmental Systems, Graduate School of Science and Technology, Keio University, Kanagawa, Japan
3 Pilates Studio Wohl, Aichi, Japan
4 Kishokai Medical Corporation, Aichi, Japan
5 School of Medicine, Zhejiang University, Hangzhou, China
Clin. Exp. Obstet. Gynecol. 2018, 45(5), 665–670;
Published: 10 October 2018

Introduction: The etiology of pregnancy-related pubic symphysis pain (PSP) is usually considered as the change in pelvic biomechanics during pregnancy. However, the biomechanical changes that occur during puerperium, and the difference of radiographic dimensions in women with different types of PSP remains unknown. Materials and Methods: Fifty women with self-reported PSP were included. Two conventional X-ray radiographic dimensions obtained on the delivery day and one-month postpartum were compared by using paired t-test. Based on the self-reported VAS at one-month postpartum, variables between pain-recovery and non-recovery groups were also compared. Results: The comparison between pre- and post-values indicates a reduced distance between FLAMs (239.1 vs. 237.0 mm), PS separation (7.9 vs. 6.5 mm), and PS translation (4.1 vs. 3.1 mm). No significant differences were observed in the distance between FLAMs, width of PS separation, or pubic symphysial surface (PSS) angle between the recovery and non-recovery groups. However, the non-recovery group exhibited a significantly large change in PS translation at one-month postpartum than the recovery group (-1.8 vs. -1.1 mm). Conclusions: The pelvic radiography demonstrated a 'closure' alteration in the pelvic cavity diameter onemonth postpartum with a decrease in the distance between FLAMs and shortened PS separation. The difference in radiographic diameters between groups was not clearly evident.
Pregnancy-related pubic symphysis pain (PSP)
Pelvic biomechanics during pregnancy
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