Tuesday, February 7, 2023

Polyhydramnios and Oligohydramnios

Background

The amniotic fluid that bathes the fetus is necessary for its proper growth and development. It cushions the fetus from physical trauma, permits fetal lung growth, and provides a barrier against infection. Normal amniotic fluid volume varies. The average volume increases with gestational age, peaking at 800-1000 mL, which coincides with 36-37 weeks’ gestation. An abnormally high level of amniotic fluid, polyhydramnios, alerts the clinician to possible fetal anomalies. An inadequate volume of amniotic fluid, oligohydramnios , results in poor development of the lung tissue and can lead to fetal death.

Polyhydramnios occurs in 1% of pregnancies,
 whereas oligohydramnios occurs in about 11% of pregnancies.
 No age variables are recognized.

In pregnancies affected by polyhydramnios, approximately 20% of neonates are born with a congenital anomaly of some type; therefore, the delivery of these newborns in a tertiary care setting is preferred. This article presents the causes, outcomes, and treatments of polyhydramnios and oligohydramnios, as well as their effects on the developing fetus and neonate.

RELATED ARTICLES
- Advertisment -

Most Popular