Comparison of Pelvic Alignment among Never-Pregnant Women,Pregnant Women, and Postpartum Women (Pelvic Alignment and Pregnancy)

Abstract

Objective: To compare the pelvic alignment among never-pregnant women, pregnant women, and postpartum women. Methods: A total of 177 nulliparous women (mean age, 18.9 ± 1.0 years), 45 pregnant women between the third and tenth month of pregnancy (mean age, 29.4 ± 3.8 years), and 124 primiparous women between the first and sixth months after delivery (mean age, 30.1 ± 4.4 years) were enrolled in this study. Pelvic alignment was measured by using the anterior superior iliac spine (ASIS) and posterior superior iliac spines (PSIS) as landmarks. The bilateral difference of pelvic tilt was defined as pelvic asymmetry (PA), the distance between bilateral ASIS was defined as the anterior width of the pelvis (AWP), and the distance between the bilateral PSIS was defined as the posterior width of the pelvis (PWP). Results: PA of the pregnant group and postpartum group were significantly greater than the never-pregnant group (2.8 ± 2.4°, 4.2 ± 3.0°, and 3.7 ± 3.2°, respectively, p < 0.001). AWP of the pregnant and postpartum group was wider than the never-pregnant group (24.9 ± 0.3 cm, 24.1 ± 0.1 cm, and 23.6 ± 0.2 cm, respectively, p < 0.001). PWP of the pregnant and postpartum group was narrower than the never-pregnant group (8.2 ± 0.3 cm, 8.6 ± 0.1 cm, and 9.2 ± 0.1 cm, respectively, p = 0.008). In the multivariate regression analysis using never-pregnant women as the reference, pregnant and postpartum women were significantly more likely to have greater PA (β = 0.156, 0.156), wider AWP (β = 0.116, 0.202), and narrower PWP (β =-0.132,-0.147) than never-pregnant women. Conclusions: We found that the alignment of the pelvis was different among never-pregnant, pregnant, and postpartum women. Jour n a l o f W om ens H e a lt h Ca re

Influence of pelvic inclination on sit to stand task in stroke patients

“…Major gender differences were shown in the joint angles during phases of sit to stand movement [18]. Also, pelvic alignment was different among never-pregnant, pregnant, and postpartum women [19].…”

Association of Pelvic Alignment and Posture in Pregnancy with Lower Back or Pelvic Girdle Pain During Postpartum Recovery: Myth or Reality? A Systematic Review

“…1,974 studies were identified, but only 18 met all inclusion criteria (Table 1). Five studies reported changes in pelvic alignment during pregnancy and postpartum recovery [17][18][19][20][21]. Five studies focused on pelvic alignment after childbirth [22][23][24][25][26].…”

“…In addition, measurements differed between studies, precluding use of a meta-analysis. Three studies included 100 -200 participants; however, authors and their institutions were the same in two studies [17,19,21]. One of the three studies was a cross-sectional study and compared participants [19]; thus, it did not observe how pelvic alignment changed during and after pregnancy [19].…”

“…Three studies included 100 -200 participants; however, authors and their institutions were the same in two studies [17,19,21]. One of the three studies was a cross-sectional study and compared participants [19]; thus, it did not observe how pelvic alignment changed during and after pregnancy [19]. Ten studies observed changes of pelvic alignment during pregnancy and postpartum recovery [17][18][19][20][21][22][23][24][25][26] (Table 3).…”

Pubic Symphysis Diastasis in Pregnancy and Delivery (Review)

“…Имеются исследования, демонстрирующие асимметрию таза, развивающуюся при беременности вследствие более значительного расширения таза во фронтальной плоскости, чем в сагиттальной. Именно эта асимметрия является причиной болей в пояснице у беременных [11].…”