Aku dah ambik masa pregnant dengan anak kedua, sebab baby nak kena protected from whooping cough especially kalau kena newborn period tu. Boleh tanya kat clinic or hospital paediatrician mana best time untuk ambik, usually they recommend during pregnancy, tapi ada juga yg ambik after delivery bergantung situation masing-masing. A few of my mum friends kata mereka tak ambik pun during pregnancy tapi they made sure baby dapat dose on schedule, so depends on your doctor's advice la! Best to check dengan your gynae or clinic apa recommendation dia untuk you specifically, sebab timing and your health history matters.