Travel By Plane

FTM 26weeks pregnant Good pm mga mamsh. Sino po dito nka pag travel via plane specifically Cebu Pacific on your 6months? I will be travelling to Manila from Cebu this Oct 27-31 and i will be 27 weeks by then. Do i need to secure a travel certificate from my OB or no need na? Di po ba strict yung cebu pac for pregnant women travelling?