英国人：生育迟，非婚生多，多胞胎猛增
(家庭医生医疗保健网宋芬报导)路透社伦敦健康消息-根据刊登在英国《国家统计表》上的数字表明，英国的双胞胎出生率在过去十年中增长了27%。
数据显示，1999年有8636名妇女生了双胞胎，267名妇女生了3胞胎、4胞胎甚至更多胎。总体来说，多胞胎的出生率为14.5‰，比1989年增长了27%。另外，生育年龄仍在继续推迟，1999年平均生育年龄是29岁，而1998年是27岁。1999年出生的婴儿数量为622,000。总的生育率是平均每个育龄妇女生育1.7个孩子，是自1977年来最低的。其中39%的婴儿是非婚生子女。
虽然统计学家们没有对这数据作出任何解释，但可以肯定这种增长跟使用几个受精卵以增加体外授精的成功率有关。
ultiple Births Up 27% in UK
LONDON (Reuters Health) - The rate of multiple births shot up 27% over the past 10 years in England and Wales, according to figures published by National Statistics.
Although the statisticians offer no explanation, the rise almost certainly reflects the practice of using several fertilised eggs to increase the chances of successful in-vitro fertilisation.
The figures show that in 1999, 8636 women gave birth to twins, 267 to triplets and four to quadruplets or more. Overall, there were 14.5 multiple births per 1000 births--27% higher than in 1989.
The figures show that the trend to delay having children is continuing. The average age of women giving birth in 1999 was 29 years compared with 27 years in 1989.
There were 622,000 births in 1999. The total fertility rate was 1.7 children per woman of childbearing age, the lowest since 1977.
Thirty-nine percent of the births were registered outside marriage., 百拇医药
数据显示，1999年有8636名妇女生了双胞胎，267名妇女生了3胞胎、4胞胎甚至更多胎。总体来说，多胞胎的出生率为14.5‰，比1989年增长了27%。另外，生育年龄仍在继续推迟，1999年平均生育年龄是29岁，而1998年是27岁。1999年出生的婴儿数量为622,000。总的生育率是平均每个育龄妇女生育1.7个孩子，是自1977年来最低的。其中39%的婴儿是非婚生子女。
虽然统计学家们没有对这数据作出任何解释，但可以肯定这种增长跟使用几个受精卵以增加体外授精的成功率有关。
ultiple Births Up 27% in UK
LONDON (Reuters Health) - The rate of multiple births shot up 27% over the past 10 years in England and Wales, according to figures published by National Statistics.
Although the statisticians offer no explanation, the rise almost certainly reflects the practice of using several fertilised eggs to increase the chances of successful in-vitro fertilisation.
The figures show that in 1999, 8636 women gave birth to twins, 267 to triplets and four to quadruplets or more. Overall, there were 14.5 multiple births per 1000 births--27% higher than in 1989.
The figures show that the trend to delay having children is continuing. The average age of women giving birth in 1999 was 29 years compared with 27 years in 1989.
There were 622,000 births in 1999. The total fertility rate was 1.7 children per woman of childbearing age, the lowest since 1977.
Thirty-nine percent of the births were registered outside marriage., 百拇医药