Which one is more accurate?

Depende po mommy sa OB mo. It's either LMP or first transvaginal ultrasound. Ako po kasi before sa first transvaginal ultrasound nagbase si OB. May 3 weeks difference kasi ako sa LMP and UTZ. Kung days lang po ang pagitan is okay lang yun dahil normally +/- 2 weeks sa EDD ang paglabas ni baby.

due dates are estimated. utz is based on baby size. difference of +/- 2 weeks is within acceptable margin.