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The primary objective of this study was to examine the effect of gestational diabetes mellitus (GDM) on pelvic girdle pain (PGP) occurrence and symptom severity. Pregnant women who were with/without GDM, 20-40 years of age, and also in the second and third trimesters of pregnancy were included in the study. PGP provocation tests were administered to 187 pregnant women to determine the presence and severity of PGP. Based on the test results, the study subjects were divided into two groups; Group 1 (GDM+, PGP+; n:32) and Group 2 (GDM-, PGP+; n:35). Both groups were asked to fill in the Pelvic Girdle Questionnaire (PGQ). The relationship between the presence of GDM and the presence of PGP was found to be significant ( p  = .043). It was found the groups were similar in view of pain, and also in PGQ total/subscale scores ( p  > .05). Although GDM has no effect on symptom severity, it has been determined that it may relate to the development of PGP. Therefore, early interventions (nutrition, exercise, belt using, etc.) are recommended to prevent the development of PGP in pregnant women with a family history of diabetes, with a previous diagnosis of diabetes and/or with GDM detected in their previous pregnancies. Clinical Trial Number: 04769375Impact of Statement What is already known on this subject? Gestational diabetes mellitus and pelvic girdle pain are pathologies that develops secondary to pregnancy-related systemic and biomechanical changes. What do results on this study add? GDM may related the development of PGP. What are the implications of these findings for clinical practice and/or further research? Early interventions (nutrition, exercise, belt using, etc.) and strict control of pregnant women in view of PGP is recommended to prevent the development of PGP in pregnant women with a family history of diabetes, with previous diagnosis of diabetes and/or with GDM detected in their previous pregnancies. The evaluation of pregnant women for PGP before administering interventions, such as exercise and diet (both decrease the pro-inflammatory markers), following the diagnosis of GDM and the measurement of plasma anti- and pro-inflammatory marker values in the same time period will further reveal the relationship between GDM and PGP.

This cross-sectional study examined the biomechanical and viscoelastic properties of the Achilles tendon (AT) and plantar fascia (PF) and analyzed their relationship in pregnant women with pelvic girdle pain (PGP). The study was conducted in a public hospital between January and May 2021. Forty-four pregnant women (PGP+, n: 22; PGP-, n: 22) and 21 non-pregnant women were included. Navicular drop was determined and the tonus, stiffness, and creep of PF and AT were measured by Myometer. Navicular drop was significantly different between the PGP+ and the non-pregnant group in both feet (Right, p  = .001; Left, p  =< .001), and the PGP- and the non-pregnant group in the left foot ( p  = .009). At the right AT, the stiffness was found to be higher in non-pregnant women compared to the PGP+ group ( p  = .007). Furthermore, creep was higher in PGP- compared to the non-pregnant group ( p  = .016). Tissue properties of PF were similar in all groups ( p  > .05). A correlation between tissue properties and the presence of PGP was not found. No findings indicated that the biomechanical and viscoelastic properties of the AT and PF were affected by the physiology of pregnancy. Moreover, no relationship was observed between the presence of PGP and the tissue properties of the AT and PF.