This document discusses normal amniotic fluid levels at different gestational ages and the causes and effects of oligohydramnios, or low amniotic fluid. It notes that oligohydramnios can be caused by maternal or fetal conditions and leads to risks for the fetus like skeletal deformities, contractures, and pulmonary hypoplasia. The management of oligohydramnios involves counseling, serial ultrasounds, amnioinfusion if needed, monitoring for signs of fetal distress, and delivery according to the specific conditions and gestational age.