Hello po. Paano po kaya nangyari na magkaiba ang no. Of weeks sa ultrasound at 1st fay of last mens?

Within a gravid uterus is a well define gestational sac measuring 2.24 cm suggestive of atleast 5 weeks aog. No definite embryonic pole nor active cardiac pulsation seen No subchorionic hemorrhage seen The adnexae are unremarkable. IMPRESSION: EARLY SIGNS OF INTRAUTERINE PREGNANCY OF QUESTIONABLE VIABILITY yan po yung nasa result ng first ultrasound ko