<unk><unk>  valve<unk>  can be diagnosed by echocardiography before birth. The diagnostic features include a poorly contracting left ventricle,<unk>  valve thickening/restriction, a varying degree of left ventricular hypertrophy and abnormal Doppler flow characteristics in the left heart. There may be little or no detectable flow into or out of the left side of the heart. There are two screening periods, one during the first trimester and the other during the second trimester.<unk>  is typically detected between 18 and 24 weeks gestation. This early detection is important because it allows for parents to be counseled in a timely and rational manner, allowing for discussion of prognosis and possible outcomes. Another reason for this crucial early detection is because it allows for postnatal management planning.
Fetal aortic stenosis
Small for gestational age
Large for gestational age
Fetal hydantoin syndrome
Persistent fetal circulation
Fetal warfarin syndrome
Neonatal sepsis
Craniopagus twins