Ay, mahirap talaga magbigay ng 100% guarantee based lang sa ultrasound, kahit ang tech ay confident! A few of us mums found na sometimes ang angle or position ng baby ay nagpapagulo, kaya medyo off ang initial prediction, one friend was told boy pero girl talaga ang baby niya. Kung gusto mo ng mas sigurado, pwede mo i-try ang NIPT test or wait for a follow-up ultrasound sa later weeks, pero honestly the best thing is to just ask your OB to double-check next time kasi sila ang best source for this. Either way, exciting na alam mo na what you're having!