日前来自英国的研究发现，非计划妊娠生下的孩的子智力（如词汇量、空间定向能力等）较有计划妊娠生下的孩子大约相差4～5个月，即前者的智力不及后者。究其原因，研究人员认为主要与社会经济因素有关。这一结果提示，非计划妊娠生下的孩子智力较差，意外怀孕不可取。因此，年青的夫妇在决定何时要孩子，并为此进行相应的准备确有必要。

Kids From Unplanned Pregnancies Tend to Lag Behind Intellectually

But British study pins the blame on children's socioeconomic status

WEDNESDAY, July 27 (HealthDay News) -- Young children born after unplanned pregnancies tend to have a smaller vocabulary and poorer non-verbal and spatial abilities than other children, but these problems are actually due to socioeconomic factors, a new study suggests.

Researchers led by Claire Carson of the University of Oxford looked at data from about 12,000 children who took part in a large U.K. study of infants born from 2000 to 2002. Their parents were interviewed when the children were 9 months old, 3 years old and 5 years old. The children's verbal, non-verbal and spatial abilities were tested at ages 3 and 5.

Children born after an unplanned pregnancy were four to five months behind children of planned pregnancies in verbal abilities, the researchers found, but these differences virtually disappeared when the researchers factored in the children's socioeconomic circumstances.

"These differences are almost entirely explained by socioeconomic factors," the researchers concluded.

They also found that mothers' infertility treatments have no effect on children's cognitive development when they are 3 and 5 years old.

The study was published online July 27 in the BMJ.

SOURCE: BMJ, news release, July 26, 201