**Core Concept**
Intrauterine hydronephrosis refers to the accumulation of urine in the fetal kidneys due to an obstruction in the urinary tract, leading to renal pelvis dilation. This condition is often detected through prenatal ultrasound and can be associated with various fetal anomalies.

**Why the Correct Answer is Right**
The management of intrauterine hydronephrosis involves monitoring the fetal renal function, assessing the degree of dilation, and evaluating for any associated fetal anomalies. **Option C**, "Serial ultrasound monitoring with possible fetal intervention," is the most appropriate management strategy for hydronephrosis detected at 32-34 weeks. This approach involves regular ultrasound assessments to monitor the fetal kidney size, renal function, and any changes in the degree of hydronephrosis. Fetal intervention may be considered if there is significant fetal renal impairment or if the hydronephrosis is associated with other fetal anomalies.

**Why Each Wrong Option is Incorrect**
**Option A:** "Immediate cesarean delivery" is not indicated for intrauterine hydronephrosis, as the condition is often managed conservatively with serial ultrasound monitoring.

**Option B:** "Amniocentesis for fetal lung maturity" is not directly related to the management of intrauterine hydronephrosis, as the primary concern is fetal renal function and associated anomalies.

**Clinical Pearl / High-Yield Fact**
It is essential to distinguish between physiological and pathological hydronephrosis in the fetus, as the latter may be associated with other fetal anomalies and requires prompt evaluation and management.

**Correct Answer:** C. Serial ultrasound monitoring with possible fetal intervention.