Amniotic fluid is in the amniotic sac. Placental problems may cause low amniotic fluid. Maternal complications may cause low amniotic fluid. Together they protect the delicate fetal skin from being damaged by the amniotic fluid. The volume of amniotic fluid increases with the growth of fetus. Stem cells are present in amniotic fluid. Choline concentrations in amniotic fluid can be ten times higher than in maternal blood. Multipotent stem cells are also found in amniotic fluid. Oligohydramnios, low levels of amniotic fluid, is common in triploid pregnancies. It is not a commensal of the healthy uterine or amniotic microbiome. The mother then licks the fawn clean of amniotic fluid and tissues. Oligohydramnios is a condition in pregnancy characterized by a deficiency of amniotic fluid. Polyhydramnios is a medical condition describing an excess of amniotic fluid in the amniotic sac. Thus, suggesting there is free passage of the intestinal contents into the amniotic fluid. Other tests for detecting amniotic fluid mainly include nitrazine paper test and fern test.