Responding to a video wondering how parents of identical twins ... birth to identical twin girls, Adalynn and Nora, who were placed in separate bassinets. Whenever she or Smith picked up a baby ...

Methods: We use data on dizygotic (DZ) and monozygotic (MZ) twins and singleton births from the first two waves of the Early Childhood Longitudinal Study—Birth Cohort (ECLS-B), a nationally ...