Toxins in tobacco pass through the mother's lungs into her bloodstream and then via the placenta into the baby's circulatory system.
菸中的有害物質，會經過準媽媽的肺，透過血液循環，經胎盤而進入胎兒的循環中。「『天下父母心』，人人希望自己的寶寶活得健康又快樂，但恐怕很少父母會想到這點吧？」