Neonatal Characteristics of Children Conceived with In Vitro Fertilization or Intrauterine Insemination Compared to Sibling Births from Unassisted Conceptions.

The results suggest treatment-related factors in addition to underlying subfertility may contribute to adverse birth outcomes and an increased risk of preterm birth, LBW, LGA, and major congenital anomalies among singleton children conceived with IVF compared to unassisted siblings.