Births: final data for 2000.

摘要: Objectives—This report presents 2000 data on U.S. births according to a wide variety of characteristics. Data are presented for maternal demographic characteristics including age, live-birth order, race, Hispanic origin, marital status, and educational attainment; (medical risk factors, weight gain, tobacco alcohol use); medical care utilization by pregnant women (prenatal care, obstetric procedures, complications labor and/or delivery, attendant at birth, method delivery); infant (period gestation, birthweight, Apgar score, abnormal conditions, congenital anomalies, multiple births). Also birth fertility rates status. Selected mother’s State residence shown, as well month day sex ratio, age father. Trends in patterns described interpreted. Methods—Descriptive tabulations reported the certificates 4.059 million that occurred presented. Results—The number rose 3 percent 2000; 1 2 percent. The total rate was above ‘‘replacement’’ first time almost 30 years. Teenage continued fall while aged 20–24 years slightly, their late twenties thirties 5 Births forties early fifties were also up 2000. unmarried women, rate, percent, but teenagers declined. Smoking down again. cesarean delivery 4 22.9, fourth consecutive increase; primary vaginal after previous down. twin rise, triplet/+ declined second year row. For decade preterm (to 11.6 percent); low birthweight however, unchanged 7.6