1. Intrauterine growth as estimated from liveborn birth-weight data at 24 to 42 weeks of gestation;Lubchenco;Pediatrics,1963
2. A standard of fetal growth for the United States of America;Brenner;Am J Obstet Gynecol,1976
3. Intrauterine growth of twins as estimated from liveborn birth-weight data;Naeye;Pediatrics,1966
4. Contribution of twin pregnancy to perinatal mortality and fetal growth retardation: reversal growth retardation after birth;Manlan;Can Med Assoc J,1978
5. Multiple gestation. ACOG Technical Bulletin 131,1989