TABLE B-5Immutable Medical Risk Factors Associated with Preterm Birth

Previous low birth weight or preterm delivery
Multiple 2nd trimester spontaneous abortion
Prior first trimester induced abortion
Familial and intergenerational factors
History of infertility
Nulliparity
Placental abnormalities
Cervical and uterine anomalies
Gestational bleeding
Intrauterine growth restriction
In utero diethylstilbestrol exposure
Multiple gestations
Infant sex
Short stature
Low prepregnancy weight/low body massindex
Urogenital infections
Preeclampsia

From: B, Prematurity at Birth: Determinants, Consequences, and Geographic Variation

Cover of Preterm Birth
Preterm Birth: Causes, Consequences, and Prevention.
Institute of Medicine (US) Committee on Understanding Premature Birth and Assuring Healthy Outcomes; Behrman RE, Butler AS, editors.
Washington (DC): National Academies Press (US); 2007.
Copyright © 2007, National Academy of Sciences.

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