Despite the loopholes , the policy has undoubtedly helped to reduce the fertility rate , which fell from 2 . 29 children per woman in 1980 to 1 . 69 this year , according to estimates by america ' s census bureau 如果排除违法现象，这一政策显然有助降低人口出生率，根据美国人口调查局的估计，这一数字从1980年的每名妇女生育2 . 9个孩子降至今年的1 . 69个。
Disappointingly , the bush administration has turned its back on fertility control in poor countries ? despite overwhelming evidence that fast , voluntary and highly beneficial transitions to low fertility rates are possible 令人失望的是，尽管有汗牛充栋的证据显示，现在已经有快速、自愿性且极为有效的降低生育率方法，美国总统布希对贫穷国家的节育议题，却不闻不问。
South korea ' s military this week unveiled a new policies aimed at making it easier for military couples to have and raise children . the country has the lowest fertility rate among developed nations with an average of 1 . 08 children per woman 韩国妇女目前的生育能力降到了发达国家中的最低，平均每名适龄妇女生育1 . 08个孩子，而每对军人夫妇中拥有的孩子仅为0 . 83个。
After immunization mating experiment was conducted , the results shown fertility rate are 91 . 6 % , 83 . 3 % , 75 . 0 % and 58 . 3 % in control , tmd iii , sp - 10 and age group respectively . the above results shown immunized age reduced the fertility rate . 3 Elisa试验和免疫荧光组化试验证明这三种重组蛋白较好地保持了天然蛋白形式的免疫原性，可用于体内外实验进一步研究它们的具体作用2
Total fertility rate refers to the average number of children that would be born alive to 1 000 women during their lifetime if they were to pass through their childbearing ages 15 - 49 experiencing the age specific fertility rates prevailing in a given year 某年的总和生育率是指一千名妇女，若她们在生育龄期(即十五至四十九岁)经历了一如该年的年龄组别生育率，其一生中活产子女的平均数目。
The new phone comes after japan ‘ s fertility rate - - the average number of children a woman bears in her lifetime - - fell to an all - time low of 1 . 25 in 2005 , sparking worries about a shrinking population 日本女性的生育率（指一名妇女在其一生中所生育孩子的数量）在2005年时降至1 . 25 ，创下了有统计数字以来的最低点，并进一步引发了日本社会对本国人口数量日益萎缩的巨大担忧，而此款新型手机也正是在这一特定背景下应运而生的。
The recommendations came as greenpeace published a report citing scientific research linking declining fertility rates and reproductive disorders in europe in the last 50 years to the development of tens of thousands of new chemicals used in a vast range household products 绿色和平组织以报告形式公布的该建议书援引了这样一项科学研究，即将欧洲过去50年的不断下降的人口出生率和生殖紊乱状况与上万种日化用品的发展联系起来。
High fertility rates are leading to extreme local environmental pressures ? water stress , land degradation , overhunting and overfishing , falling farm sizes , deforestation and other habitat destruction ? thereby worsening the grave economic challenges these lands face 高生育率会对当地环境造成严重的冲击：水资源不足、土地遭受侵蚀、过度渔猎、农田面积缩小、山林滥垦和其他生物栖息的地区受到破坏，让原本就很棘手的经济困境雪上加霜。
