Polyhydramnios is the excessive accumulation of amniotic fluid — the fluid that surrounds the baby in the uterus during pregnancy. Polyhydramnios occurs in about 1 to 2 percent of pregnancies. Most cases of polyhydramnios are mild and result from a gradual buildup of amniotic fluid during the second half of pregnancy. Severe polyhydramnios may cause shortness of breath, preterm labor, Symptoms Polyhydramnios symptoms result from pressure being exerted within the uterus and on nearby organs. Mild polyhydramnios may cause few — if any — signs or symptoms. Severe polyhydramnios may cause: Shortness of breath or the inability to breathe Swelling in the lower extremities and abdominal wall Uterine discomfort or contractions Fetal malposition, such as breech presentation Your health care provider may also suspect polyhydramnios if your uterus is excessively enlarged and he or she has trouble feeling the baby. Causes Some of the known causes of polyhydramnios ...
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