CAS 3D/4D ultrasound

Question lang po mga mami, Tama po ba na ang CAS ay recommended na gawin hindi lalagpas ng 28weeks? What about po yung 3D/4D ultrasound, may recommended weeks po ba or wala naman po? Salamat po sa sasagot 🤗 22 weeks na po tyan ko and nagbabalak po magpa CAS then next month sana 3D/4D #1stimemom #firstbaby #pregnancy