Hi mama! So "balbon" tyan usually means ang baby ay mas mataas or pointed ang tyan, which is one of those old wives' tales na supposedly sign ng boy, pero honestly, a lot of us moms have had that and ended up with girls din, haha! The shape of your belly really depends more sa body type mo, how you carry, at positioning ng baby rather than gender, kaya hindi talaga reliable na sign yan. Best way to know for sure is through ultrasound na lang, pero I get the excitement ng guessing, those early pregnancy months are fun na ganyan!