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Pregnancy, breastfeeding and fertility while taking Pre-Exposure Prophylaxis (PrEP)

PrEP and pregnancy

PrEP can be taken during pregnancy, as it is not thought to be harmful to the baby.

If you are trying to get pregnant or are already pregnant, talk to your doctor about the risks and benefits of continuing PrEP. Do not stop taking it without speaking to your doctor.

PrEP and breastfeeding

If your doctor or health visitor says your baby is healthy, you can take PrEP daily if you are breastfeeding.

PrEP passes into breast milk in very small amounts and it is unlikely to cause any side effects in your baby. However, some babies have had mild diarrhoea.

If you become HIV positive, your clinic will discuss the options with you.

Talk to your health visitor, midwife, doctor or pharmacist as soon as possible if you have any concerns, including if your baby:

  • is not feeding as well as usual or is not putting on weight
  • has a tummy upset, for example diarrhoea or being sick
  • has difficulty sleeping

PrEP and fertility

There is no evidence to suggest that taking PrEP reduces fertility in either men or women. However, speak to your clinic doctor if you are trying to get pregnant.

Non-urgent advice: Tell your doctor if you're:

  • trying to get pregnant
  • pregnant
  • breastfeeding

Page last reviewed: 10 March 2023
Next review due: 10 March 2026