Hi mama! Honestly, I'm not sure kung may Trans V specialists specifically sa Malolos or Calumpit area, most ng specialized ultrasound services like that ay usually concentrated sa Metro Manila or bigger hospitals lang. What I'd suggest is mag-call na lang directly sa major hospitals near you like Malolos Medical Center or ask your OB for a referral, kasi yun talaga ang best way to know both kung available at magkano exactly. If kailangan mo talaga ng Trans V ultrasound, baka need mo mag-go sa Quezon City or Manila hospitals, and prices usually range from 2-4k depending on the facility, pero mag-confirm ka talaga. Good luck, mama!