Well guys Ramzi was wrong for me lol. I had an ultrasound at 7 weeks and it said boy. The Chinese calendar said girl and it was right. Now looking at my ultrasound picture the skull theory is also right saying girl. I don't have any pictures where the nub is visible. Heart rate has been between 148-164 the entire time, not sure how that one works but I thought I would include it. 😊 Good luck with all your babies. 💜