EDD means EXPECTED/ ESTIMATED Date of Delivery, and is usually give or take 2 weeks. You can't really be sure kung kailan ka manganganak kahit pa 100% sure ka sa LMP mo or kahit date of conception pa yan, or anuman nakalagay sa ultrasound. Kasi hindi naman guarantee na saktong after 40 weeks ka manganganak. Personally mas sinusunod ko yung based sa LMP since the ultrasound is usually based on baby's actual size/ development kaya pabago-bago.
hi po EDD is only estimated. For ultrasound po sa mismong size and weight nag base yung age ng fetus. so mas accurate po magbase sa ultrasound. pero dapat hindi nagkakalayo si LMP at ultrasound. usually 1week-2weeks dapat pagitan.
Tere SC