Fetal diagnosis is the prenatal evaluation of the developing fetus to detect, characterize, and prognosticate structural anomalies, genetic conditions, and functional disturbances before birth. It combines noninvasive imaging, chiefly detailed ultrasonography and fetal magnetic resonance imaging, with biochemical sc…
Fetal diagnosis is the prenatal evaluation of the developing fetus to detect, characterize, and prognosticate structural anomalies, genetic conditions, and functional disturbances before birth. It combines noninvasive imaging, chiefly detailed ultrasonography and fetal magnetic resonance imaging, with biochemical screening and invasive sampling such as amniocentesis and chorionic villus sampling for cytogenetic and molecular analysis. These tools allow clinicians to identify malformations of the thorax, abdomen, heart, and other systems, to quantify their severity, and to anticipate physiological consequences such as hydrops or pulmonary compromise. Accurate fetal diagnosis underpins prognostic counseling and management planning, distinguishing conditions that resolve spontaneously from those requiring monitoring, intrauterine intervention, or specialized delivery. In the context of Fetal Surgery, precise diagnosis is essential for case selection, defining lesions such as congenital diaphragmatic hernia, pulmonary airway malformations, and pleural effusions amenable to procedures including thoraco-amniotic shunting. Serial assessment tracks disease trajectory and the effect of treatment over gestation. Diagnosis also encompasses recognition of inherited metabolic and neurodegenerative disorders, informing decisions about pregnancy management and postnatal care. By integrating imaging, laboratory genetics, and clinical judgment, fetal diagnosis provides the evidence base for multidisciplinary maternal-fetal care, enabling families and clinicians to weigh prognosis, plan interventions, and coordinate the timing and setting of birth for optimal neonatal outcomes.
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