Ay yes, maraming OBs dito talaga ang nire-recommend ang pertussis vaccine during pregnancy, especially in the third trimester! A few of my mum friends did it kasi ang sabi ng doctors nila it helps protect the baby from day one, lalo na ang newborns ay vulnerable talaga sa whooping cough. If your OB suggested it, it's definitely worth discussing with them pa kung anong timing ang best for you and what to expect, they know your health situation best.