OP05.10: First and second trimester head‐to‐body ratios of 1, 353 fetuses with major congenital heart disease compared to 507, 661 controls: a nationwide study. Issue Volume 58:Issue S1(2021)Supplement (14th October 2021) - Jørgensen, D.E.; Vedel, C.; Ekelund, C.K.; Rode, L.; Sundberg, K.; Petersen, O.B.