Request Ultrasound

Ptpa. Adk kolang po nakapag ultrasound napo ako ng Pelvic which is 2nd/3rd Trimester Scan. Ngayon po irerequestan po ako ni Ob ko ng panibagong ultrasound which is 3rd Trimester Scan (Fetal Anatomic Survey) ang sabi po ni OB same as CAS daw po yang ultrasound pero kung CAS yung gagawin kopo hindi napo clear yung result kasi po going to 34 weeks napo ako. Need daw po macheck kung may mga defects and abnormalities si baby since may history po ako sa 1st born kopo na namatay due to Cyanotic Heart Deases. Ano po kaya yang nirequest saakin. Same as pelvic ultrasound padin po kaya siya? Thankyou po in Advance ☺️