Developmental outcomes of infants adopted from foster care: Predictive associations from perinatal and preplacement risk factors
2020
Infants adopted domestically from foster care often present with prenatal substance exposure and risky birth outcomes such as prematurity and low birth weight. Because few longitudinal studies of foster-adoptive infants exist, it is unclear how these preplacement risk factors influence development over time. The present study examined associations between perinatal risk factors and developmental outcomes among an ethnically/racially-diverse sample of 97 infants in foster-care (56% boys) placed into adoptive homes at ages 0-19 months. Relative to population-norms, foster-adoptive infants showed comparable cognitive but lower language and motor functioning at baseline and one-year follow-up. Age-adjusted language scores significantly improved one year following placement, consistent with a developmental "catch-up" effect. Low birth weight uniquely predicted lower language scores at baseline, but this association was no longer significant at follow-up. Prenatal substance exposure was associated with lower baseline cognitive scores, but only for infants placed after six months of age. In contrast, infants with low birth weight and later placement age (>12 months) showed the most accelerated motor development. Sex differences emerged at follow-up when predicting motor and language outcomes, suggesting potential sex-specific pathways of risk. Overall, results support adoption as an early intervention that may buffer vulnerability to perinatal risk on development.
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