fertility rate

基本解釋

It is lower than the two-children-per-woman fertility rate in the United States.
它比美國平均每戶家庭兩個孩子的人口增長率還低。
Japan's fertility rate -- the average number of children a woman bears in her lifetime -- fell to an all-time low of 1.25 last year.
去年，日本的生育率（一個婦女一生中所生孩子的平均數(shù)量）下降至歷史最低點，只有1.25。
www.chinadaily.com.cn
This is the case for example of the reduction in the fertility rate of long-cycle species, the effects of which span periods of 10 to 20 years.
例如，長周期物種出生率的下降就是這樣一個例子，其影響可持續(xù)10至20年。

Although America benefits greatly from immigration, its fertility rate has actually consistently been sub-replacement for almost all of the past 20 years.
FORBES: Russian and American Birth Rates Have Rapidly Converged
Every country in Eastern Europe, and a number of Western countries as well, has a fertility rate that will lead to substantial long-term population decline and Russia is the exact opposite of unique in this regard.
FORBES: If Russia Is A 'Dying Nation' So Is Every Other Country In Eastern Europe
Take Bangladesh, a country mired in poverty yet with a fertility rate only slightly higher than America thanks to a progressive family-planning policy.
ECONOMIST: Population booms, and busts

受精率
The percentage of normal sperm morphology fertility rate than normal sperm morphology≥5% patients, P
3.精子正常形態(tài)率受精率降低,P
數(shù)學
生育率