Tetanus, diphtheria and pertussis vaccine in pregnancy

This combination is designed to prepare the immune system to recognise three different bacteria-related diseases. Protection made by the pregnant person can pass to the baby before birth, helping cover the early period before the baby follows their own immunisation schedule. The vaccine does not cause tetanus, diphtheria or pertussis infection.

The timing offered can depend on local guidance, the stage of pregnancy, previous vaccination and whether there is a current outbreak or other clinical concern. A healthcare professional can check the product and schedule suitable for you.

Tell the vaccinator about previous vaccine reactions, allergies, a high temperature or feeling unwell, medicines, and any pregnancy complications. Bring your vaccination record if you have it. After the injection, remain where the team can observe you briefly and keep the arm comfortable with gentle movement.

Soreness, redness, tiredness or a mild fever can occur for a short time. Ask your maternity or primary-care team which symptom-relief medicine is appropriate in pregnancy rather than choosing one without checking. Vaccination is preventive care; antibiotics do not replace it.

Seek urgent help for trouble breathing, swelling of the face or throat, widespread hives, fainting that does not settle, or severe weakness soon after vaccination. Contact your maternity team for a persistent high fever, worsening illness, reduced fetal movement, bleeding, fluid loss or painful contractions. A sore throat alone is not a reason to assume a vaccine reaction; use the guidance for [Sore Throat](/symptoms/sore-throat/) if it needs assessment.

Ask which formulation is being offered, why this timing is recommended for your pregnancy, how it fits with earlier doses, and what to do if you missed the suggested appointment. Also ask which reactions are expected, which need a call, and how your baby's later immunisations will be arranged.