Objectives To explore the method and operating skill of fetal echocardiography in diagnosing cardiac malposition.Methods 91 consecutive fetuses were studied(control:50 cases,cardiac malposition :41 cases) between 2003 and 2008.The position of fetal heart was evaluated according to the fetal posture and the visceral situs by fetal routine scanning.The detailed echocardiography should be performed in the differential diagnosis of cardiac lesions when the heart was found to be abnormal position.Results In the control group,all fetuses were levocardia.39 cases of cardiac malpositions were detected by fetal echocardiography,included 25 fetuses with dextrocardia,6 mesocard,5 with levoversion of heart,3 common heart of conjoined twins and 2 extrathorax heart.Two of dextroversion were missed by fetal routine scanning,but found by autopsy or operation after birth.Conclusions When the abnormal visceral situs was found by fetal routine scanning,there is exceedingly high incidence of cardiac malpositions.Proficiently operating skill of fetal echocardiography is helpful to detect abnormal fetal cardiac position. Objectives To explore the method and operating skill of fetal echocardiography in diagnosing cardiac malposition. Methods 91 consecutive fetuses were studied (control: 50 cases, cardiac malposition: 41 cases) between 2003 and 2008.The position of fetal heart was evaluated according to the fetal posture and the visceral situs by fetal routine scanning.The detailed echocardiography should be performed in the differential diagnosis of cardiac lesions when the heart was found to be abnormal position. Results In the control group, all fetuses were levocardia. 39 cases of cardiac malpositions were detected by fetal echocardiography, 25 fetuses with dextrocardia, 6 mesocard, 5 with levoversion of heart, 3 common heart of conjoined twins and 2 extrathorax heart. Two of dextroversion were missed by fetal routine scanning, but found by autopsy or operation after birth. Conclusions When the abnormal visceral situs was found by fetal routine scanning, there is exceedingly high incidence of cardiac malpo sitions.Proficiently operating skill of fetal echocardiography is helpful to detect abnormal fetal cardiac position.