(A) Although adolescents frequently have a higher incidence of low-birth-weight infants, this client is 21 years old. (B) Uncomplicated induced abortions have not been proved to influence the growth of infants of subsequent pregnancies. (C) Compounds in cigarettes and some illicit drugs cause maternal vasoconstriction and a subsequent reduction in O2 availability for the fetus owing to the resulting reduction in uteroplacental blood flow. As few as one or two drinks of alcohol per day will decrease birth weight. (D) Although early prenatal care has been shown to improve pregnancy outcomes, not seeking care until the second week of gestation does not, in and of itself, cause intrauterine growth retardation.