Amnioinfusion for Fetal Renal Failure

A 20- or 22-gauge spinal needle (routinely used obstetrics and gynecology needle) will be used by an expert in fetal procedures with sterile technique to access the amniotic cavity under real-time ultrasound guidance to infuse isotonic fluid (Lactated Ringers with 1g/L of Oxacillin). This fluid will act as replacement amniotic fluid. Regular monitoring of fluid levels may suggest serial infusion, which will be completed as deemed necessary by the study doctor.