搜索结果: 1-3 共查到“人口学原理 trends”相关记录3条 . 查询时间(0.095 秒)
Recent trends in the timing of first sex and marriage among young women in Ethiopia
Ethiopia reproductive behavior intercourse
2015/7/27
Ethiopia has been characterized by high population growth. Recent social and economic developments have the potential to alter reproductive patterns in the country. Some of these developments in...
Behind a stable and relatively high fertility level in Norway during the 1990s we find increasing differences in the pattern of fertility both in regard to the timing of the first childbirth and numbe...
Have national trends in fertility between 1986 and 2006 occurred evenly across England and Wales?
national trends England and Wales fertility
2010/1/20
During the past 20 years fertility patterns within England and Wales have changed considerably. The total fertility rate experienced a prolonged decline during the 1990s and hit a record low in 2001. ...