What is Fetal cardiac activity can be detected by vaginal USG by howmany weeks after LMP and explain in detail?
Ans C Ref: Williams Obstetrics page 350First trimester evaluation With transvaginal scanningGestational sac reliably seen in uterus by 5 wksFetal echoes and cardiac activity by 6 wksCardiac motion typically observed when embryo is reached 5mm in length Sheila Balakrishnan-577Gestational sac - 4 1/2 wksYolk sac - 5wksFetal node - 5 1/2 wksFetal heart - 6wks