The Right Heart During and After Pregnancy - an Echocardiographic Study

The main goal is to establish echocardiographic reference values of the right heart for pregnant women, assuming they differ significantly from those of non pregnant women of same age. Therefore the investigators will use existing reference values published by American society of echocardiography and European Association of Echocardiography. As side arms the investigators want to explore, whether illness of either fetus or mother is connected with right heart affection.