I had my 20 week scan yesterday at 21 weeks and have been going out of my mind. At the end of my scan the sonographer explained to me that the skin at the back of my baby's neck was measuring 7.5mm when it should be measuring anything up to 6mm. Everything else seemed normal and no abnormalities found. She said because she has took a measurement of 7.5mm she has to refer it to fetal med for a second opinion and I will be most likely hearing from them after the weekend. She said it may be that they think it's an isolated thing and not do anything or they may want to do further investigations. During my scan I remember her asking if I had the screening for downs etc and I said I hadn't. just going out of my mind really, anyone been in a similar position?