Uy mama, that's such an important question! Pero para sa specifics like kung hanggang ilang weeks and kung kailangan mo pa ng TVS, talaga dapat tanungin mo ang OB mo directly, sila ang makakaalam ng best timing based sa situation mo.
A few of us pregnant mums dito, lagi naming tinatanong din yan sa doctor kasi worried din kami, hehe. The good news is your OB will guide you on exactly what you need at each stage ng pregnancy mo. Don't hesitate to ask them lahat ng questions, yan yung job nila!