Highlights
- •The rectal position at rest is more caudally located in women with a history of two or more vaginal deliveries than nulliparae.
- •The vaginal cross-sectional area increases in women with a history of two or more deliveries compared with that in nulliparae.
- •At rest, the position of bladder and uterus is not unchanged by vaginal delivery.
Abstract
Purpose
Evaluate the effect of vaginal delivery on pelvic organ positions and vaginal cross-sectional
areas.
Methods
MRI of 119 premenopausal women were grouped according to the number of deliveries.
The distances from the three 3-reference points (bladder, uterus, and rectum) to two
2-lines (pubococcygeal-line (PCL) and midpubic-line (MPL)), length of H- and M-lines
and vaginal cross-sectional area were compared between the groups.
Results
With increasing parity, distance from the rectum to PCL tended to increase (nullipara
vs. bipara; p < 0.01). Vaginal cross-sectional area was larger in bipara and tripara than in nullipara
(p < 0.01).
Conclusions
Rectal position is more caudally located and vaginal cross-sectional area is larger
in bipara than in nullipara.
Keywords
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Article info
Publication history
Published online: December 15, 2017
Accepted:
December 11,
2017
Received in revised form:
December 5,
2017
Received:
July 31,
2017
Identification
Copyright
© 2017 Elsevier Inc. All rights reserved.
