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 language | English (US) |
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Pages (from-to) | 1264-1266 |
Number of pages | 3 |
Journal | American journal of obstetrics and gynecology |
Volume | 161 |
Issue number | 5 |
DOIs | |
State | Published - Nov 1989 |
Keywords
- Ultrasonography
- amniotic fluid volume
- fetal urine production
ASJC Scopus subject areas
- Obstetrics and Gynecology