Major congenital malformations: Any structural defect with surgical, medical, or cosmetic importance recognized) are presented as a proportion of fetal cases in live births, or in live births, stillbirths, and termination of pregnancy due to fetal anomaly
a The denominator is all prospective pregnancies with known outcome. The prevalence is calculated as the number of fetuses/infants with at least one major malformation per 100 fetuses/infants. If any infants had multiple anomalies, only the worst anomaly was counted.