Swedish scientists analysed more than 10,000 families in the study . The researchers found that children who were exposed to higher levels of lead during pregnancy had a lower IQ and poorer cognitive performance at age five compared with those whose mothers did not have high blood lead. Other factors include viral infection , diet and early weight gain .
Swedish scientists analysed more than 10,000 families in the study . 58 children with diabetes had also been badly affected by previous events . Other factors include viral infection , diet and early weight gain .