Ay, hindi ko exact na alam ang specific clinics sa Marikina sorry, but I'd suggest checking sa Facebook groups ng Marikina moms or asking sa your OB, marami kaming friends na nakakuha ng referrals straight from their doctors kaya trusted talaga! You can also try calling the bigger hospitals or wellness centers in Marikina like Rizal Medical Center area, usually may prenatal services sila or they know kung saan available.