The symptoms of pericarditis depend on the type, but may include: 1  high temperature. 2  sweating and chills. 3  breathing problems, such as breathlessness. 4  dry cough. 5  abnormal heart rhythms, such as accelerated heartbeat (tachycardia) 6  sharp and stabbing chest pains. 7  pain radiating into the left shoulder and arm.
It is not always possible to determine what causes low levels of amniotic fluid. Oligohydramnios can be caused by a continuous leaking of amniotic fluid. It can also occur when the fetus has kidney failure. After about four months of pregnancy, the kidneys of a normal fetus will produce the amniotic fluid. If the fetus has kidney abnormalities, the amount of amniotic fluid may be too low.
It can occur at any time during pregnancy, but it is most common during the last trimester. If a woman is past her due date by two weeks or more, she may be at risk for low amniotic fluid levels since fluids can decrease by half once she reaches 42 weeks gestation.Oligohydramnios can cause complications in about 12% of pregnancies that go past 41 weeks.mniotic fluid is produced soon after the amniotic sac forms at about 12 days after conception. It is first made up of water that is provided by the mother, and then around 20 weeks fetal urine becomes the primary substance.