Dept of Obstetrics and Gynecology, Hôpital Félix Guyon, rue des Topazes, 97400 Saint-Denis, Reunion Island, France. Ph : 0262 90 55 22.

These are three different ultrasound exams, each done a week apart, on an infant with posterior urethral valves and the evolution to anhydramnios in that period.

Scan at 14 weeks:

Scan at 15 weeks:

Scan at 16 weeks: Note the progression to complete anhydramnios

The parents opted to terminate the pregnancy and the diagnosis of posterior urethral valves was confirmed.