Hey mama! Hmm, haven't heard of CAS ultrasound specifically pero may mga clinics sa Taguig na nag-oofffer ng regular ultrasounds, try checking BGC Medical Center or the hospitals around Bonifacio Global City area, meron silang obstetrics departments. A few of us usually go to malls with diagnostic centers kaya mas convenient, like SM or Ayala malls sa Taguig, and yung prices usually around 800-1500 pesos depending sa type ng ultrasound, pero mag-call ka na lang directly para sa exact rates kasi nagbabago-bago rin sometimes!