Tdap & Pregnancy:
If you are pregnant and your doctor recommends the Tdap vaccine "To protect your baby", you need to read the insert. Here it is explaining how it's never been tested on pregnant women. It also states they are collecting data on pregnancy outcomes. YOU ARE THE STUDY! It’s also not known if it’s safe while breastfeeding.
Here is collected data:
“16.7% spontaneous abortion”
Here's the link to the insert for the Adacel Tdap vaccine. Boostrix, the other one, is similar.