Noun | 1. | prenatal diagnosis - any of the diagnostic procedures used to determine whether a fetus has a genetic abnormality diagnostic procedure, diagnostic technique - a procedure followed in making a medical diagnosis echography, sonography, ultrasonography, ultrasound - using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs amnio, amniocentesis - (pregnancy) extraction by centesis of amniotic fluid from a pregnant woman (after the 15th week of pregnancy) to aid in the diagnosis of fetal abnormalities fetoscopy, foetoscopy - prenatal diagnosis that allows direct observation of a fetus in the uterus and the withdrawal of fetal blood |