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Fetal urine output in hydramnios
1Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas.
Obstetrics and Gynecology
|February 1, 1989
Summary
Hydramnios, or excess amniotic fluid, may stem from increased fetal urine output in conditions like twin-twin transfusion or diabetes insipidus. In contrast, gastrointestinal obstruction or idiopathic cases show normal fetal urination.
Area of Science:
- Perinatal Medicine
- Fetal Physiology
- Obstetrics
Background:
- Hydramnios is a condition characterized by excessive amniotic fluid during pregnancy.
- The etiology of hydramnios is diverse, necessitating investigation into fetal physiological factors.
Purpose of the Study:
- To investigate the relationship between fetal urine output and hydramnios in various pregnancy complications.
- To differentiate causes of hydramnios based on fetal urination patterns.
Main Methods:
- Evaluation of fetal urine output in 12 pregnancies with hydramnios.
- Comparison of urine output in twin gestations with hyperperfusion, singleton gestations with gastrointestinal obstruction, and idiopathic hydramnios.
Main Results:
- Six of six twin fetuses with hydramnios exhibited urine output above the 95th percentile.
- One singleton fetus with diabetes insipidus showed markedly elevated urine output.
- Singleton pregnancies with gastrointestinal obstruction or idiopathic hydramnios had normal fetal urine output.
Conclusions:
- Markedly elevated fetal urine output, particularly in hyperperfused twins or fetuses with diabetes insipidus, is associated with hydramnios.
- Increased fetal urination does not appear to be a significant factor in hydramnios associated with gastrointestinal obstruction or idiopathic causes.