A lot of lung diseases affect the heart, too - especially the right heart. Well known examples are pulmonary embolism or pulmonary hypertension. But rather unknown is the fact, that right heart function presents as a prognostic parameter in a lot of (left heart) diseases, for example myocardial infarction, atrial fibrillation, left heart failure, but also in chronic obstructive pulmonary disease (COPD) or may be even diabetes mellitus. Since the left part of the heart has been studied by researchers more than fifty years, the right heart has moved into scientific focus not long ago.~The tool of choice to examine the living heart is echocardiography. There are no relevant risks or complications.~During an echocardiographic examination a lot of parameters are collected. To judge data in a clinical way reference values belonging to healthy persons are essential. Those values are highly dependant on sex, body size, age etc.~Since pregnancy changes a lot in the human body, reference values from non pregnant woman of same age (published by American society of echocardiography and European Association of Echocardiography) are presumably not representative. So the investigators want to establish echocardiographic reference values of the right heart for pregnant women. Therefore an echocardiographic examination will be applied within each trimester of pregnancy and after delivery. As side arms the investigators want to explore, whether illness of either fetus or mother is connected with right heart affection.
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.