Maternal prenatal social contact during the COVID-19 pandemic predicts infant birth weight.

Background: Social connectedness and mental health have been associated with infant birth weight, and both were compromised by the COVID-19 pandemic.

Aims: We sought to examine whether changes in maternal prenatal social contact due to the COVID-19 pandemic were associated with infant birth weight and if maternal prenatal mental health mediated this association.

Study Design: A longitudinal study of mothers and their infants born during the first wave of the COVID-19 pandemic.