We hypothesized that (a) nonsmoking
women with prenatal exposure to SHS will have the
same incidence of PTB compared to nonsmoking,
nonexposed pregnant women and (b) infants of
nonsmoking women exposed to prenatal SHS exposure
will have similar birth weights, birth lengths, and
the same incidence of respiratory distress syndrome
(RDS) and Neonatal Intensive Care Unit (NICU) admission
within the ¢rst 24 hours of life compared to
infants of nonsmoking, nonexposed women.