Nub Theory? Boy or Girl?

Hannah

Hi All!

I had my first trimester scan today at 13+5 weeks, baby is developing perfectly and no issues so my husband and I are super pleased.

I can't understand nub theory for the life of me but I think you can see a nub in this photo of baby, what do we think, boy or girl?

I always wanted a girl before I got pregnant (now I just want it to be healthy and I don't care what it is!) but I have this weird feeling that little'un is a boy 💙