1. Causes of low birth weight births in public and private patients;Meis;Am J Obstet Gynecol,1987
2. Etiologies of preterm birth in an indigent population: is prevention a logical expectation?;Tucker;Obstet Gynecol,1991
3. Neonatal morbidity according to gestational age and birth weight from five tertiary care centers in the United States, 1983 through 1986;Robertson;Am J Obstet Gynecol,1992
4. Births: final data for 2002;Martin;Natl Vital Stat Rep,2003
5. Collagen content of human amniotic membranes: effect of gestation length and premature rupture;Skinner;Obstet Gynecol,1981