In 2015, 1.7% of all infants born in the United States were conceived with ART.

Approximately, 35% of ART infants were born in multiple births compared with 3% among infants born in the general population.

A greater proportion of ART infants were low birth weight (26%), and preterm (31%), compared with infants in the birth population overall (8% and 10%, respectively), mainly due to a higher rate of multiple births.

Nationwide, the percentage of elective single embryo transfer increased from 7.4% in 2009 to 34.7% in 2015 among women aged <35 years. From 2014 to 2015, the percentage of elective single embryo transfer among women aged <35 years increased by approximately 22.0%.