The trend all over the developed world in recent years has been more women having more children later; mean age in the United States at birth of a first child increased from 24.9 to 26.3 from 2000 to 2014. And whether it’s a first child or a later child, more women giving birth are 35 and older, which is still classified as “advanced maternal age” (well, it beats “elderly”).
In a study published in February in the International Journal of Epidemiology, researchers looked at evidence from three different large longitudinal studies in Britain, from 1958, 1970 and 2000-2, each involving around 10,000 children. They were looking at the association between maternal age at children’s birth and children’s cognitive ability when tested at age 10-11.
In the two earlier studies, there was a negative association; maternal age 35-39 at birth was associated with poorer cognitive scores in the children, tested a decade later; the children who had been born to mothers 25-29 did better. On the other hand, for the most recent study, that association was reversed; the children born to the 35- to 39-year-olds did significantly better on the cognitive testing than the children born to the younger mothers.
What had changed over time? The researchers found that they could explain this reversal by correcting for the social and economic characteristics of the mothers [материцкий капитал приобретает другой смысл, вообще приобретает смысл]; different women, in different circumstances, were having their children later in life.
“Nowadays children of older mothers have, on average, better outcomes because of the characteristics of women who tend to have children at older ages,”
Dr. Goisis said.
“Older mothers seem to thrive better,” said Tea Trillingsgaard, an associate professor of psychology at Aarhus University in Denmark, who was the lead author on the study. “The mothers have more psychological flexibility, more cognitive flexibility, more ability to tolerate complex emotional stimuli from the children.”
когда сам читал былло 235 каментов
“Emotional well-being tends to increase with age,” Dr. Trillingsgaard said. “Age in itself may be an advantage.”