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Updated: Nov 18, 2025

Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse POP Quantification System
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Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse POP Quantification System

Published on: September 20, 2018

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A case-control study of clinical characteristics and risk factors of symptomatic postpartum pubic symphysis diastasis

Ji-Hee Sung1, Mina Kang1, Seung-Jae Lim2

  • 1Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea.

Scientific Reports
|February 9, 2021
PubMed

Insights

Postpartum pubic symphysis diastasis (PPSD) incidence rose with increasing maternal age. Nulliparity is the primary risk factor for PPSD, a condition involving separation of the pubic symphysis after childbirth.

Area of Science:

  • Obstetrics and Gynecology
  • Pelvic Health
  • Maternal-Fetal Medicine

Background:

  • Postpartum pubic symphysis diastasis (PPSD) is a condition characterized by the separation of the pubic symphysis following childbirth.
  • Diagnosis is typically based on clinical presentation and radiological evidence.
  • Understanding PPSD's clinical characteristics and risk factors is crucial for effective management.

Purpose of the Study:

  • To investigate the incidence and trends of PPSD over time.
  • To identify clinical characteristics and significant risk factors associated with PPSD.
  • To analyze the relationship between PPSD and demographic/obstetric factors.

Main Methods:

  • A nested case-control study design was employed.
  • Data were retrospectively collected from a cohort of women who delivered vaginally at a single institution.
  • Matching criteria included the year and gestational age at delivery.

Main Results:

  • The overall incidence of PPSD was 0.156% (33/21,131).
  • PPSD incidence increased from 0.08% (2000-2004) to 0.36% (2010-2016), correlating with rising maternal age.
  • Nulliparity was identified as the sole significant risk factor for PPSD (81.8% in cases vs. 57.6% in controls, p=0.01).

Conclusions:

  • The incidence of PPSD has shown an upward trend, paralleling the increase in average maternal age.
  • Nulliparity is a key risk factor for developing postpartum pubic symphysis diastasis.
  • Further research may explore specific interventions for nulliparous women at risk.

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