Aaah alam ko, mahal talaga ang transvaginal ultrasound, lalo na kung recurring checks! Have you tried asking your OB kung may installment option or kung pwede mag-referral siya sa cheaper clinic na may same equipment, a few of us did that and nag-work out naman. Some hospitals or diagnostic centers outside the mall are way cheaper, pero importante talaga na trusted pa rin ang facility kaya best to ask your doc for recommendations basta reliable ang results. Kaya mo yan, mama!