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  • Diphtheria
  • Tdap and Pregnancy
  • Pertussis
  • Tdap and Pregnancy
  • Tetanus
  • Tdap and Pregnancy

If a mother received Tdap in early pregnancy, should another dose be given in the third trimester?

No, it is not recommended to give another dose of Tdap in such cases. Optimal timing for Tdap administration is between 27 and 36 weeks’ gestation because that stage of pregnancy is best for transplacental antibody movement to the fetus.

More information is available at, pages 22–23.

Last reviewed: March 31, 2022

This page was updated on .