1990 - 2005年美国估计的妊娠率：最新情况
Estimated pregnancy rates for the United States, 1990-2005: an update.
作者信息
Ventura Stephanie J, Abma Joyce C, Mosher William D, Henshaw Stanley K
机构信息
Divison of Vital Statistics, Centers for Disease Control and Prevention, National Center for Health Statistics, Hyattsville, MD 20782, USA.
出版信息
Natl Vital Stat Rep. 2009 Oct 14;58(4):1-14.
OBJECTIVES
This report presents detailed pregnancy rates for 1990-2005, 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 2005, an estimated 6,408,000 pregnancies resulted in 4.14 million live births, 1.21 million induced abortions, and 1.06 million fetal losses. The 2005 pregnancy rate of 103.2 pregnancies per 1000 women aged 15-44 years is 11 percent below the 1990 peak of 115.8. The teenage pregnancy rate dropped 40 percent from 1990 to 2005, reaching an historic low of 70.6 per 1000 women aged 15-19 years. Rates fell much more for younger than for older teenagers.
目的
本报告展示了1990 - 2005年的详细妊娠率，更新了自1976年以来的全国系列妊娠率数据。
方法
列出并简要描述了按年龄、种族和西班牙裔血统以及婚姻状况划分的妊娠率表格数据。
结果
2005年，估计有640.8万例妊娠，其中414万例活产，121万例人工流产，106万例胎儿死亡。2005年每1000名15 - 44岁女性的妊娠率为103.2次妊娠，比1990年的峰值115.8低11%。1990年至2005年青少年妊娠率下降了40%，达到每1000名15 - 19岁女性70.6次妊娠的历史低点。年龄较小的青少年妊娠率下降幅度比年龄较大的青少年大得多。
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