Polyhydramnios

1. INTRODUCTION

• Polyhydramnios is a condition of pregnancy where there is excess amniotic fluid, affecting fetal and maternal health.

  
  

2. DEFINITION

• Amniotic Fluid Index (AFI) > 25 cm

OR

• Single deepest vertical pocket > 8 cm

  
  

3. CAUSES

Maternal Causes

• Diabetes mellitus (most common)

• Hypertension

• Multiple pregnancy (twins, triplets)

Fetal Causes

• Congenital anomalies (GI obstruction: esophageal/duodenal atresia, cleft palate)

• Neurological disorders (impaired swallowing)

• Chromosomal abnormalities

Placental Causes

• Hydrops fetalis

• Rh incompatibility

Other Causes

• Idiopathic (most cases ~50%)

• Twin-to-twin transfusion syndrome (in multiple pregnancy)

4. RISK FACTORS

Maternal diabetes

• Multiple pregnancy

• History of polyhydramnios in previous pregnancy

• Fetal anomalies

5. CLINICAL MANIFESTATIONS

Maternal

• Rapidly increasing abdominal size

• Abdominal discomfort, dyspnea

• Edema

• Premature contractions

Fetal

• Malpresentation (breech or transverse)

• Fetal movement may feel exaggerated

• Premature birth

  
  

6. COMPLICATIONS

Maternal

• Preterm labor

• Premature rupture of membranes

• Hypertension / Preeclampsia

• Postpartum hemorrhage

Fetal

• Malpresentation

• Umbilical cord prolapse

• Fetal distress

• Preterm birth

• Perinatal mortality

7. DIAGNOSIS

• Ultrasound: AFI > 25 cm, single deepest pocket > 8 cm

• Maternal evaluation: Blood sugar, Rh typing

• Fetal evaluation: Anomaly scan

  
  

8. TREATMENT / MANAGEMENT

Conservative

• Close monitoring of mother and fetus

• Treat underlying maternal condition (e.g., diabetes)

• Bed rest and hydration

Medical

• Amnioreduction: removal of excess amniotic fluid in severe cases

• Indomethacin (in some cases, reduces fetal urine output; only in 2nd trimester under monitoring)

Obstetric Management

• Monitor for preterm labor

• Plan delivery based on fetal and maternal status

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🚀Here’s a short “exam trick” version for Polyhydramnios — super quick points you can remember :

Introduction:

Excess amniotic fluid affecting fetal and maternal health.

Definition:

AFI > 25 cm or deepest pocket > 8 cm.

Causes:

Maternal diabetes, fetal anomalies, multiple pregnancy, idiopathic.

Risk factors:

Diabetes, multiple pregnancy, prior polyhydramnios, fetal anomalies.

Clinical manifestations:

Rapidly growing abdomen, dyspnea, edema, malpresentation, preterm labor.

Complications:

Preterm labor, PROM, malpresentation, cord prolapse, fetal distress, PPH.

Diagnosis:

Ultrasound AFI > 25 cm, maternal blood sugar, anomaly scan.

Treatment:

Treat underlying cause, amnioreduction, indomethacin (if 2nd trimester), monitor & plan delivery.

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🚀Here’s a set of 07 MCQs on polyhydramnios for practice :

1. Polyhydramnios is defined as:

A. AFI < 5 cm

B. AFI > 25 cm

C. Deepest pocket < 2 cm

D. AFI = 10 cm

Answer: B. AFI > 25 cm

2. Most common cause of polyhydramnios is:

A. Maternal diabetes

B. Maternal hypertension

C. PROM

D. Placental insufficiency

Answer: A. Maternal diabetes

3. Which fetal anomaly is commonly associated with polyhydramnios?

A. Esophageal atresia

B. Renal agenesis

C. Hydrocephalus

D. Spina bifida

Answer: A. Esophageal atresia

4. Maternal symptom often seen in polyhydramnios is:

A. Decreased abdominal size

B. Dyspnea and abdominal discomfort

C. Paleness

D. Reduced fetal movement

Answer: B. Dyspnea and abdominal discomfort

5. A major complication of polyhydramnios is:

A. Pulmonary hypoplasia

B. Preterm labor

C. Fetal anemia

D. Neonatal jaundice

Answer: B. Preterm labor

6. Idiopathic polyhydramnios accounts for approximately:

A. 10%

B. 25%

C. 50%

D. 75%

Answer: C. 50%

7. Management of severe polyhydramnios may include:

A. Amnioreduction

B. Oral iron

C. Bed rest only

D. Blood transfusion

Answer: A. Amnioreduction