Pls help ?!!!

Ay mama, ang obstetrics ultrasound talaga ang mas accurate para sa dating ng pregnancy kasi yun ang specialized para dito! Ang second one from the sonographer might have a slight difference, pero trust the OB's reading more, usually that's what they go with for your due date anyway, kaya stick with March 20 na lang para hindi ka ma-confuse. If you're still worried, just ask your OB next visit kung bakit may difference ang dates, baka may explanation sila!