1990 - 2000年美国估计的妊娠率：最新情况
Estimated pregnancy rates for the United States, 1990-2000: an update.
作者信息
Ventura Stephanie J, Abma Joyce C, Mosher William D, Henshaw Stanley
机构信息
U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics, Division of Vital Statistics, Hyattsville, Maryland 20782, USA.
出版信息
Natl Vital Stat Rep. 2004 Jun 15;52(23):1-9.
OBJECTIVES
This report presents detailed pregnancy rates for 1990-2000, updating a national series of rates extending since 1976.
METHODS
Tabular data on pregnancy rates by age, race, and Hispanic origin, and by marital status are presented and briefly described.
RESULTS
In 2000 an estimated 6,401,000 pregnancies resulted in 4.06 million live births, 1.31 million induced abortions, and 1.03 million fetal losses. The 2000 pregnancy rate of 104.0 pregnancies per 1,000 women aged 15-44 years is 10 percent lower than the 1990 peak of 115.6. The teenage pregnancy rate dropped 27 percent during 1990-2000, reaching an historic low of 84.5 pregnancies per 1,000 women aged 15-19 years. Rates for younger teenagers declined relatively more than for older teenagers.
目的
本报告呈现了1990 - 2000年的详细妊娠率，更新了自1976年起的全国系列妊娠率数据。
方法
列出并简要描述了按年龄、种族、西班牙裔血统以及婚姻状况划分的妊娠率表格数据。
结果
2000年，估计有640.1万例妊娠，其中406万例为活产，131万例为人工流产，103万例为胎儿丢失。2000年每1000名15 - 44岁女性的妊娠率为104.0次妊娠，比1990年的峰值115.6低10%。1990 - 2000年期间青少年妊娠率下降了27%，降至每1000名15 - 19岁女性84.5次妊娠的历史低点。较年轻青少年的妊娠率下降幅度相对大于较年长青少年。
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