Oo, totoo yan, sometimes ang dating based sa LMP ay mas maaga compared sa ultrasound dating, lalo na kung irregular periods mo or kung later ka nag-ovulate, kaya possible talaga ang December labor even though ang ultrasound mo says January. Best na i-confirm mo ulit with your OB kung ano talaga ang final dating they're going with, para sure kayo both on the same page at prepared ka na rin psychologically, basta ingat ka na rin lagi at report agad any signs of early labor!