A: Having too little amniotic fluid (oligohydramnios) occurs most commonly when a pregnancy goes past it's due date. It can, however, occur earlier in pregnancy. There are many possible causes and can include ruptured membranes (you broke your bag of water), birth defects such as problems with the baby's kidneys, problems with the placenta, maternal complications such high blood pressure, diabetes or lupus, and occasionally, a reason can't be found. The risk of having oligohydramnios occur in a subsequent pregnancy is really based on the reason for the low fluid In the first place. Some conditions such as diabetes and high blood pressure, are recurring and therefore the risk of oligohydramnios is high in a subsequent pregnancy. Other issues, such as having a fetus with a kidney problem, will likely not occur again, therefore the oligohydramnios won't occur again. It is best to talk to your practitioner about your risk based on your own medical history.