I didn't, its never been tested for efficacy or safety in pregnancy... Its just protocol but no proof any immunity is actually passed to baby so you might just be putting a foreign substance in your body for no reason
My dh wanted me to get it when I was offered it in the hospital. When I told our pediatrician that I got it, she just looked at me and laughed and said I didn't need to have gotten it. Oh well, it was done.
Re: Tdap/whooping cough