Oligohydramnios is defined as too little amniotic fluid. There is an association between oligohydramnios and both intrauterine growth restriction and increased perinatal mortality1 . Normal amniotic fluid volume changes with gestational age and ways of accurately estimating it have changed over the years. Oligohydramnios has been defined as2 :
This is a companion discussion topic for the original article at https://patient.info/doctor/obstetrics/oligohydramnios