1. Birth Rate or (Crude Birth Rate) refers to the ratio of the number of births to the average population during a certain period of time(usually a year), which is often expressed in ‰. 出生率 （又称粗出生率）指在一定时期内（通常为一年）出生人数与同期平均人数（或期中人数）的比率，一般用千分率表示。
2. WHO says environmental hazards can cause __9__, still birth, low birth weight and birth defects. 世卫组织称环境危害可能导致流产，死胎，出生体重不足，婴儿先天性缺陷。
3. WHO says environmental hazards can cause miscarriage, still birth, low birth weight and birth defects. WHO表示环境危害可能导致流产、死胎、出生体重不足和婴儿先天性缺陷。
4. WHO says environmental hazards can cause miscarriage, still birth, low birth weight and birth defects. WHO说环境危害可以导致流产、难产、新生儿低重及新生儿缺陷。
5. The contents of right of birth cover the right of birth or abortion, and the knowledge of planned birth. 生育权的内容包括了计划生育权、堕胎权以及获得计划生育知识、方法和教育权。
