“…Socioeconomic, ethnic and racial, and age differences in birthweight or gestational age at delivery might be expected based on past research (Cramer, 1987;Powell-Griner, 1988;Rogers, 1989;Samuels, 1986). African-American women, poor or uneducated women, and women less than 18 years old or more than 35 years old have higher rates of low birthweight in the United States (Becerra, Hogue, Atrash, & PeVez, 1991;Buescher et al, 1988;Institute of Medicine, 1985;Shiono, Klebanoff, Graubard, Berendes, & Rhoads, 1986; R. L. Williams, Binkin, & Clingman, 1986).…”