Table 1.

The application of AI in accuracy improvement of obstetric ultrasound.

	First trimester	Second- and last-trimester
Structure identification	Detection of fetal limbs	Recognition of facial structure Recognition of abdominal organs Calculation of ventricular volume and the thickness of ventricular wall
Automatic measurement	Measurement of NT and crown-rump length automatically	Estimate the AC/HC automatically Estimate the volume of fetal head and its internal structures Estimate the volume of fetal stomach and bladder
Classification and diagnosis	Assessment of fetal development	Neurodevelopmental maturity prediction Diagnosis of growth restriction
		Diagnosis of Craniocerebral malformation
		Assessment of fetal lung maturity
		Diagnosis of congenital heart disease
		Evaluation and prediction of premature birth by cervical ultrasound
		Evaluation of fetal weight and gestational age