From 16 weeks onwards gender may appear on an ultrasound
When I was enquiring about my nub theory everyone said girl but I’m having a boy so at this stage I wouldn’t take it as a determining point but rather a fun guess
Mine told me with confidence girl at 18weeks and every scan up to 32 weeks after that I was told boy so when I gave birth first thing I did was check🫣 nub theory also said girl… he was definitely a boy
Mine told me boy at 12 weeks, genetics confirmed he is infact a boy and he most definitely left us with no doubts at your ultrasound today! It’s definitely possible but not always 100%!
They should never say with 100% confidence. At 12+6 it’s just the nub theory that might give you a clue