The drugs are often given to pregnant mothers at risk of a premature birth to help the baby’s lungs prepare for life outside the womb.
The study, in the journal PLoS One, showed there was a higher risk of attention nike free run sneakers disorders at age eight.
The charity Bliss said it reinforced the need for regular health checks.
Being born too soon can lead to long-term health problems and the earlier the birth the greater the problems.
One immediate issue is the baby’s lungs being unprepared to breathe air. Steroids can help accelerate lung development.
However, the study by researchers at Imperial College London and the University of nike 3.0 v4 running shoe Oulu in Finland showed the drugs may also be affecting the developing brain.
These are really important and lifesaving drugs. These findings shouldn’t affect clinical practice and parents shouldn’t worry”
Prof Vivette Glover
Imperial College London
They compared what happened to 37 premature children whose mother was injected with steroids with 185 premature children, of the same weight and gestational age, who were not exposed to the extra dose of steroid.
When the children were followed to the age of eight, there was a higher incidence of attention deficit hyperactivity disorder. No difference could be detected at age 16, but this may have been due to the small size of the study.
Prof Vivette Glover, of Imperial College, told the BBC: “There is an increase in risk, but nike 3.0 v5 most children are not affected.
“These are really important and lifesaving drugs. These findings shouldn’t affect clinical practice and parents shouldn’t worry.”
She said the findings backed up previous research on stress, anxiety and depression in pregnancy affecting the child.
Those conditions increase levels of cortisol and may be having a nike free 4.0 similar effect on the developing brain as glucocorticoid steroids had in this study.