Pregnancy ultrasound and childhood cancer: a second report from the Oxford Survey of Childhood Cancers

The Oxford Survey of Childhood Cancers is a nationwide study into the aetiology of childhood cancer; eligible cases are those children dying of cancer before their 16th birthday in the UK. Findings for 1982-4 deaths are reported here. Interview data were sort from parents of 1373 children who died from cancer. The results reported here are independent of earlier analysis. Control children were individually matched with case children on sex and date of birth. The results of this study do not indicate that pregnancy ultrasound influences the risk of childhood cancer.