Hindi ko na-try personally ang placental doppler, pero a few of my mom friends did it around 32-34 weeks kasi worried sila sa baby's growth, usually dinala nila sa public hospitals like Philippine General Hospital or sa maternity clinics sa provincial health centers kasi mas mura talaga compared sa private ultrasound centers. Best mo talaga mag-ask directly sa OB mo kung saan sya usually nag-rerefer for doppler studies, kasi sometimes may partner sila or may in-house equipment na okay ang rate, at mas trusted mo pa kung alam mo na recommended ng doctor mo mismo yung clinic!