Birth weight of infants after maternal exposure to typical and atypical antipsychotics: prospective comparison study.

Background: The effects of in utero exposure to atypical antipsychotics on infant birth weight are unknown.

Aims: To determine whether atypical and typical antipsychotics differ in their effects on birth weight after maternal exposure during pregnancy.

Method: Prospective data on gestational age and birth weight collected by the National Teratology Information Service for infants exposed to typical (n=45) and atypical (n=25) antipsychotics was compared with data for a reference group of infants (n=38).