vein disorder pregnancy disorder amniotic fluid embolism ICD9:673.14 Embolism, Amniotic Fluid MESH:D004619 Sirarat Sarntivijai Blocking of maternal circulation by AMNIOTIC FLUID that is forced into uterine VEINS by strong UTERINE CONTRACTION near the end of pregnancy. It is characterized by the sudden onset of severe respiratory distress and HYPOTENSION that can lead to maternal DEATH. MedDRA:10001976 MedDRA:10001971 MedDRA:10001972 MedDRA:10001973 MedDRA:10001974 MedDRA:10001975