Fertility rate is relatively low after the early newborn baby grows up

Fertility rate is relatively low after the early newborn baby grows up
Fertility rate is relatively low after the early newborn baby grows up
Fertility rate is relatively low after the early newborn baby grows up It is reported ' Reporter Li TianShu) The relevant baby of one publication of " magazine of American medical association " that is published on March 26 were born the research article of the situation pointed out, compared with mature baby that produces, the early newborn baby has high mortality, fertility rate is relatively low after it grows up. Background of article this reveal early newborn baby mean baby that born within the 37 week after fertilized. In the surviving baby among them was born during 26 weeks, 60% will present the deformity; In the baby born during 31 weeks, 30% would have deformity. In addition, people know little long-term death risk and overall health status of the early newborn baby. This that the expert from medical center of Duke University launched is studied, aim at, determine early survive, parenting for a long time of newborn baby and take place to future generation early yield can exert an influence. Researchers have analyzed more than 1,160,000 people data from Norway of 1967 - 1988, and tracked by the end of 2002 continuously; Also carried on the assessment to education degree and parenting result of the persons who were born of 1967 - 1976 at the same time, it's time to analyze that has been lasting by the end of 2004 all the time. Receiving has 60354 early newborn babies in investigators, accounts for 5.2% of the total number of person. Researchers find, the death risk of the early newborn baby is relatively high, the premature delivery boys of 22 weeks - 27 weeks are 1.33% 5.9 -year-old mortality at a year old, it is 1.01% from 6 years old to 12.9 years old, it is 5.3 times higher than to produce boys maturely; The girl born in 22 weeks - 27 weeks is 1.71% 5.9 -year-old mortality at a year old, 9.7 times higher than to produce girl's mortality maturely. And the early newborn baby born from 28 weeks to 32 weeks has increased by more than two times than the mortality of mature persons who produced. Researchers notice, fertility rate is lower than the mature persons who produce too after premature delivery person grows up, man, women born from 22 weeks to 27 weeks, its absolute fertility rate was 13.9% and 25% respectively, among them male fertility rate dropped by 76%, but women have dropped by 67%; Man, women born from 28 weeks to 32 weeks, its absolute fertility rate was 38.6% and 59.2% respectively, among them male fertility rate dropped by 30%, women have dropped by 19%.


|