Updates are available Correction dated 2016-07-12

Click to view Correction: https://doi.org/10.1186/s12884-016-0948-2

The use of balloons for uterine cervical ripening is associated with an increased risk of umbilical cord prolapse: population based questionnaire survey in Japan

Crossref DOI link: https://doi.org/10.1186/s12884-015-0432-4

Published Online: 2015-01-22

Published Print: 2015-12

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