Congenital malformations in singleton infants conceived by assisted reproductive technologies and singleton infants by natural conception in Tehran, Iran

ABSTRACT

Background: Multiple pregnancies occur more frequently in assisted reproductive technology [ART] compared to normal conception [NC]. It is known that the risk of congenital malformations in a multiple pregnancy are higher than single pregnancy. The aim of this study is to compare congenital malformations in singleton infants conceived by ART to singleton infants conceived naturally