Hi mama! Best call the hospital directly, they usually have a lab or OB department na pwedeng sagutin agad kung available ang OGTT nila, kasi bawat hospital may different setup talaga. A few of us moms dito sa area nag-ask din directly sa Aman Rodriguez, so make sure to ask din kung kailangan mo ng referral from your OB or pwede na agad pang-book ng appointment!