搜索结果: 1-1 共查到“人口学 Contraceptive Failures”相关记录1条 . 查询时间(0.125 秒)
Are All Contraceptive Failures Unintended Pregnancies? Evidence from the 1995 National Survey of Family Growth
Contraceptive Failures Unintended Pregnancies National Survey of Family Growth
2009/9/15
Context: The incidence of unintended pregnancy has long been used as a primary indicator of the state of reproductive health. However, the definition—and therefore the measurement—of this indicator ha...