IVF treatments that require the direct injection of sperm into the egg are associated with a small increased risk of intellectual disability in the resulting children, according to a study.
Scientists also found that standard IVF treatment posed no increased risk of children developing intellectual disabilities or autism.
IVF is considered generally safe. About 4% of IVF children have physical or mental problems at birth, compared with 3% of those conceived naturally.
In the latest study, the largest so far into links between reproductive treatments and neurodevelopment, scientists examined how IVF might affect the incidence of autism and intellectual disability.