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.
Pathophysiology. Rupture of the membranes is the most common cause of oligohydramnios. However, because the amniotic fluid is primarily fetal urine in the latter half of the pregnancy, the absence of fetal urine production or a blockage in the fetus' urinary tract can also result in oligohydramnios.
In about half of cases, we donât know what causes polyhydramnios. In other cases, we can identify a cause. Some known causes are: 1  Birth defects, especially those that affect the babyâs swallowing. 2  A babyâs swallowing keeps the fluid in the womb at a steady level. 3  Diabetes â Having too much sugar in your blood.olyhydramnios is when you have too much amniotic fluid. Amniotic fluid is the fluid that surrounds your baby in your uterus (womb). Itâs very important for your babyâs development.