In the second-trimester CHD evaluation, what is a key purpose of repeat imaging?

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The main point is that repeating imaging in the second-trimester CHD evaluation is used to track how the fetal heart defect may evolve and to organize delivery with access to specialized neonatal and cardiac care. Fetal heart conditions can change as the fetus grows—anatomy, function, valve performance, and even hemodynamics can shift—and reassessing these findings helps refine prognosis and the perinatal plan. By repeating imaging, clinicians can decide the optimal timing and place of delivery, ensure the delivery occurs at a center equipped for fetal cardiology and neonatal cardiac surgery if needed, and coordinate immediate postnatal management. This approach improves outcomes by aligning monitoring with potential changes in the fetus and preparing for necessary interventions right from birth. It’s not about determining gender, nor about terminating at the first sign, and it does not replace postnatal imaging, which remains essential for confirming anatomy and planning treatment after birth.