Polyhydramnios
Definition
Polyhydramnios is the presence of excessive amniotic fluid surrounding the unborn infant.
Considerations
Amniotic fluid surrounds and cushions the infant throughout development. There may be too little or too much amniotic fluid due to problems in the fetus.
Polyhydramnios can occur if the fetus does not swallow and absorb amniotic fluid in normal amounts. This can happen due to gastrointestinal disorders, brain and nervous system (neurological) problems, or a variety of other causes. Polyhydramnios may also be related to increased fluid production, as is the case with certain fetal lung disorders.
Sometimes, no specific cause for polyhydramnios is found.
Causes
- Achondroplasia
- Anencephaly
- Beckwith-Wiedemann syndrome
- Diaphragmatic hernia
- Duodenal atresia
- Esophageal atresia
- Gastroschisis
- Gestational diabetes
- Hydrops fetalis
- Multiple gestation (for example, twins or triplets)
- Myotonic dystrophy
What to Expect at Your Office Visit
This condition is discovered during pregnancy, and evaluated before delivery. If the health care provider finds a fetal abnormality, the baby will be delivered in a hospital with specialists who can provide immediate evaluation and treatment.
Documenting polyhydramnios may include:
- History of this pregnancy
- History of previous pregnancies and health of the children delivered
- Other family history
- Ultrasound scans of the fetus
Reviewed By: A.D.A.M. Editorial Team: David Zieve, MD, MHA, Greg Juhn, MTPW, David R. Eltz. Previously reviewed by Peter Chen, M.D., Department of Obstetrics and Gynecology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network (11/9/2007).
