Anatomic changes in the pelvis after uncomplicated vaginal delivery: evaluation with serial MR imaging.

Journal Article (Journal Article)

PURPOSE: To demonstrate the normal involution process of the post-partum pelvis with serial magnetic resonance (MR) imaging. MATERIALS AND METHODS: MR imaging was performed in 14 women after uncomplicated vaginal delivery. Six women underwent serial MR examinations at less than 30 hours and at 1 week, 2 weeks, 6 weeks, and 6 months after delivery; eight women were examined only within 30 hours of delivery. The dimensions and signal intensity of the uterus and cervix and the appearance of other pelvic structures were evaluated. RESULTS: The mean length of the uterine corpus was 13.8 cm within 30 hours of delivery and 5.0 cm at 6 months. The mean length of the cervix was 5.6 cm within 30 hours of delivery and 2.9 cm at 6 months. The junctional zone was not visible before 2 weeks; however, it was visible in all cases at 6 months. The outer cervical stroma had high signal intensity less than 30 hours after delivery and intermediate signal intensity thereafter. The inner cervical stroma was visible as a low-signal-intensity stripe on all images. CONCLUSION: Knowledge of the normal MR appearance of the involuting postpartum pelvis provides a baseline for interpretation of MR images obtained during this period.

Full Text

Duke Authors

Cited Authors

  • Willms, AB; Brown, ED; Kettritz, UI; Kuller, JA; Semelka, RC

Published Date

  • April 1995

Published In

Volume / Issue

  • 195 / 1

Start / End Page

  • 91 - 94

PubMed ID

  • 7892501

International Standard Serial Number (ISSN)

  • 0033-8419

Digital Object Identifier (DOI)

  • 10.1148/radiology.195.1.7892501


  • eng

Conference Location

  • United States