Anatomy General obstetrics 7bec5f2f Earliest of fetal hea can be detected at: A 6-6.5 weeks B 6.5-7 weeks C 7.1-7.5 weeks D 8 weeks High-Yield Explanation When the question says - Cardiac activity is earliest detected at it means it's about TVS (Transvaginal sonography),which is seen at 6 weeks. Ref: Callen 4e pg 119,120.