Pregnancy testing prior to vaccination
Public Health England’s Immunisation Against Infectious Disease (The Green book) advises that routine questioning about last menstrual period and/or pregnancy testing is not required before offering the vaccine. Women who are planning pregnancy or in the immediate postpartum can be vaccinated with a suitable product for their age and clinical risk group.
Fertility and pre-conception Covid-19 vaccine advice
The British Fertility Society and Association of Reproductive and Clinical Scientists have produced a document addressing questions asked about COVID-19 vaccines and fertility. This states that there is absolutely no evidence, and no theoretical reason that any of the vaccines can affect the fertility of women or men.
Public Health England state that there is no need to avoid getting pregnant after COVID-19 vaccination. They go on to advise that there is no evidence that COVID-19 vaccines have any effect on fertility or the chances of becoming pregnant after vaccination.
Vaccination during pregnancy
The Green book advises that there is no known risk associated with giving inactivated, recombinant viral or bacterial vaccines or toxoids during pregnancy. Since inactivated vaccines cannot replicate, they cannot cause infection in either the mother or the fetus. Although AstraZeneca COVID-19 vaccine contains a live adenovirus vector, this virus is not replicating so will not cause infection in the mother or the fetus. UKTIS have produced a monograph on the use of non-live vaccines in pregnancy which provides further information.
The Green book states that women who are pregnant should be offered vaccination at the same time as non-pregnant women based on their age and clinical risk group. Pfizer BioNTech and Moderna vaccines are the preferred vaccines to offer to pregnant women based on extensive post-marketing experience of their use in the USA with no safety signals so far. Clinicians should discuss the risks and benefits of vaccination with the woman, who should be told about the absence of safety data for the vaccine in pregnancy.
The RCOG have developed a range of information resources for healthcare professionals and pregnant women about COVID-19 vaccination. Up to date leaflets and posters on vaccination in pregnancy to share with women who are pregnant, planning a pregnancy or breastfeeding are available from the UK Health Security Agency. The Royal College of Midwives also has a number of useful resources for maternity staff to support pregnant women to get the vaccine.
If a woman finds she is pregnant after she has started a course of vaccine, she may complete vaccination during pregnancy using the same vaccine product (unless contraindicated). UKHSA advice states that second doses should not be delayed. Where the first dose was from the AstraZeneca (AZ) vaccine, women should also consider the information in the COVID-19 vaccination and blood clotting leaflet.
Termination of pregnancy following inadvertent immunisation should not be recommended.
Surveillance of inadvertent administration in early pregnancy
This is being conducted for the UK by the Public Health England Immunisation Department.
You should report cases of inadvertent administration of COVID-19 vaccines in early pregnancy to Public Health England. Information collected will be used to better inform pregnant women who are immunised, their families and health professionals who are responsible for their care.
The Green book advises that women who are inadvertently vaccinated in early pregnancy should be offered a second dose of the same product where not contraindicated.
- New link to recent PHE information relating to fertility. Reference to JCVI statement removed.
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- Information on timing of second dose added from UKHSA guidance with link to COVID-19 vaccination and blood clotting leaflet
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