Aww, breech pa lang yan sa 21 weeks kaya wag mag-worry, karamihan ng babies turn pa naman before delivery, they have plenty of time to flip around pa! As for gender guess based on position, honestly walang scientific basis yan hehe, but if you believe in the old wives' tales, some say breech boys at head-down girls, pero totoo lang na 50/50 yan talaga, parang coin flip lang! Enjoy the guessing game muna habang nagpapakita na rin sya ng signs sa anatomy scan mo later, yan talaga ang sure way to know! How are you feeling otherwise, mama? Excited na makita ang baby sa next ultrasound?
based on nub theory, the image looks like girl.