LOL DH is quite used to me coming out with MN acronyms, I once texted him asking "Can you bring DS1 home a treat, he's had a bad day" Got a reply along the along the lines of who the fuck is DS1 LOL I have mentioned norks, fanjo, even EWCM, he just gives me the sort of look and tuts at MN for influencing my vocab!
GJ agree with Diege, take no notice of the nusre, it is solely for dating purposes (i.e. not medical). Besides, that is what dating scans are for, and IME even if you 100% on your dates they only take notice of the dating scan dates anyway.