Table 4. Number of cases diagnosed and not diagnosed through ultrasound, relative to the number of cases diagnosed in the postnatal period.

	Postnatal examination (+)	Postnatal examination (-)
Ultrasound (+)	25	54
Ultrasound (-)	169	2,430

Postnatal examination (+): with fetal anomaly; Postnatal examination (-): without fetal anomaly; Ultrasound (+): with fetal anomaly; Ultrasound (-): without fetal anomaly.