Gunjan Sharma (Senior Registrar)*
Girish Prabhakar (Assistant Professor)**
Satish Kachhawa (Associate Professor)***

Department of Obstetrics and Gynaecology*, Department of Paediatric Surgery**, Department of Radiology***, S.P. Medical College, Bikaner, India

The patient is a 22-year-old primigravida with an unremarkable medical history. The following ultrasound pictures were taken at 35 weeks' gestation when she presented for a routine ultrasound examination.

1. What is the clinical impression?

2. What are the ultrasonographic criteria for diagnosis?

3. What other foetal conditions can be diagnosed on maternal ultrasonography?

4. In which of these does foetal intervention improve the overall prognosis?