ABSTRACT: A retrospective investigation examined patterns of use of prenatal care and pregnancy outcomes (low birthweight and preterm births) in 6176 pregnancies without antepartum medical complications. Prenatal care use patterns differed significantly by mother's age, marital status, race, education, method of payment, and gravidity. By controlling for these differences through a logistic regression procedure, results showed that prenatal care was associated with significant reductions in the number of infants who were delivered preterm or had low birthweight. Fewer very low-birthweight (<1500 g) infants were among the preterm infants delivered to mothers with prenatal care compared with women who received no prenatal care. These data suggest that significant improvements in pregnancy outcomes are seen among women who use prenatal care, and these benefits occur in the absence of antepartum complications.