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Williams Obstetrics, 23e
| Section VII. Obstetrical Complications > |
Chapter 36. Preterm Birth
Sections: Preterm Birth: Introduction, Mortality Rates of Preterm Infants, Morbidity in Preterm Infants, Mortality and Morbidity at the Lower and Upper Extremes of Prematurity, Reasons for Preterm Delivery, Antecedents and Contributing Factors, Diagnosis, Prevention of Preterm Birth, Management of Preterm Rupture of Membranes and Preterm Labor, Preterm Labor with Intact Membranes, References.
Topics Discussed: premature birth.
Excerpt:"Low birthweight defines neonates who are born too small. Preterm or premature births are terms used to define neonates who are born too early. With respect to gestational age, a newborn may be preterm, term, or postterm. With respect to size, a newborn may be normally grown and appropriate for gestational age; small in size, thus, small for gestational age; or overgrown and consequently, large for gestational age. In recent years, the term small for gestational age has been widely used to categorize newborns whose birthweight is usually below the 10th percentile for gestational age. Other frequently used terms have included fetal-growth restriction or intrauterine growth restriction. The term large for gestational age has been widely used to categorize newborns whose birthweight is above the 90th percentile for gestational age. The term appropriate for gestational age designates newborns whose weight is between the 10th and 90th percentiles. Thus, infants born before term can be small or large for gestational age but still fit the definition of preterm. Low birthweight refers to births 500 to 2500 g; very low birthweight refers to births 500 to 1500 g; and extremely low birthweight refers to births..."
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