Measurement of fetal urine production in normal pregnancy by real-time ultrasonography

Ron Rabinowitz, Mark T. Peters, Sanjay Vyas, Stuart Campbell, Kypros H. Nicolaides

Research output: Contribution to journalArticle

165 Scopus citations

Abstract

Serial measurements of fetal bladder volume were obtained by real-time ultrasonography at 2- to 5-minute intervals, and the hourly fetal urine production rate was calculated. The mean hourly fetal urine production rate increased from 5 ml/hr at 20 weeks' gestation to 51 ml/hr at 40 weeks. These values are double those reported in previous studies that measured fetal bladder volumes at 15- to 30-minute intervals because the cycle length is shorter than previously thought.

Original languageEnglish (US)
Pages (from-to)1264-1266
Number of pages3
JournalAmerican journal of obstetrics and gynecology
Volume161
Issue number5
DOIs
StatePublished - Nov 1989

Keywords

  • Ultrasonography
  • amniotic fluid volume
  • fetal urine production

ASJC Scopus subject areas

  • Obstetrics and Gynecology

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