There is no evidence that immunising pregnant women with this type of vaccine can cause any harm.
The whooping cough vaccine is not a live vaccine and it cannot cause whooping cough in women or their babies.
All medicines (including vaccines) are tested for safety and effectiveness by the Medicines and Healthcare Products Regulatory Agency (MHRA). The vaccine meets the high safety standards required for it to be used in the UK and other European countries. The vaccine has been given to millions of people worldwide.
Once they're in use, the safety of vaccines continues to be monitored by the MHRA.
The whooping cough vaccine is the safest and most effective way to protect your unborn baby from whooping cough.
A 2014 study in the UK (of nearly 18,000 pregnant women) found no safety concerns related to getting immunised against whooping cough when pregnant.