These Q&As were updated on 16 April 2021 and will
be reviewed as new information and advice emerges. For general
information on pregnancy and COVID-19 visit our main Q&A page.
Key messages
- The latest advice from the Joint Committee on Vaccination and
Immunisation (JCVI) is that COVID-19 vaccines should be offered to
pregnant women at the same time as the rest of the population, based on
their age and clinical risk group. Women should discuss the benefits and
risks of having the vaccine with their healthcare professional and
reach a joint decision based on individual circumstances.
- You should not stop breastfeeding in order to be vaccinated against COVID-19.
- Women trying to become pregnant do not need to avoid pregnancy after
vaccination and there is no evidence to suggest that COVID-19 vaccines
will affect fertility.
- Having a COVID-19 vaccine will not remove the requirement for
employers to carry out a risk assessment for pregnant employees, which
should follow the rules set out in this government guidance.
- See our statement in response to change in guidance around the Oxford AstraZeneca vaccine
Resources to help with decision making
If you are pregnant and have been offered a COVID-19 vaccine, the
decision whether to have the vaccination is your choice. You may find
the following resources helpful:
Q. Which pregnant women are being offered a COVID-19 vaccine?
The JCVI updated their advice on 16 April 2021 and are now advising
that all pregnant women should be offered the COVID-19 vaccine at the
same time as the rest of the population, based on their age and clinical
risk group.
Previously their advice was that pregnant women at high risk of
exposure to the virus or with high risk medical conditions should
consider having a COVID-19 vaccine in pregnancy (priority groups 1, 2, 4
and 6).
As of 16 April, COVID-19 vaccination is offered to the following groups of pregnant women:
- Those with high risk medical conditions who have a greater risk of severe illness from COVID-19
- Health or social care workers – who are at very high risk of catching COVID-19
- Individuals considered at high risk of COVID-19 because of health
and personal factors that include age, ethnicity, BMI and underlying
health conditions (this includes pregnant women in priority group 6)
- Women diagnosed with gestational diabetes in pregnancy or pregnant women with a BMI of more than 40
- Individuals aged 45 or over
As COVID-19 vaccines are made available to younger people in the
general population, they will also be made available to pregnant women
in those age groups.
The benefits and risks of COVID-19 vaccination in pregnancy should be
discussed on an individual basis. The discussion should include
acknowledgement that, while there is no known risk associated with
giving other non-live vaccines to pregnant women, there are no specific
data as yet about the safety of COVID-19 vaccination in pregnancy.
If you are eligible for and have been offered a COVID-19 vaccine, the
decision whether to have the vaccination in pregnancy is your choice.
Make sure you understand as much as you can about COVID-19 and about the
vaccine and discuss your options with a trusted source like your doctor
or midwife.
Q. I am a pregnant healthcare worker and have been offered a COVID-19 vaccination, what should I do?
Since 31 December 2020, pregnant women who are frontline health or
social care workers, including carers in a residential home, have been
able to discuss the option of vaccination. This is because the risk of
exposure to COVID-19 may be higher, even if they have a low risk of
experiencing complications if they are otherwise well.
If you are eligible for and have been offered a COVID-19 vaccine, the
decision whether to have the vaccination in pregnancy is your choice.
The risks and benefits of vaccination will need to be assessed on an
individualised basis. This may include factors such as your ethnicity,
whether you are overweight or obese, any underlying health conditions
you may have as well as occupational exposure and ability to socially
distance at work.
Public health advice is that, until further data are available, those
who are vaccinated should continue to observe all current guidance and
transmission reduction measures, including social distancing and the
wearing of personal protective equipment (PPE).
If you are a pregnant health or social care worker, having a vaccine will not change your occupational risk assessment.
This includes not working in high-risk areas if you are 28 weeks
pregnant and beyond, or if you have an underlying health condition that
puts you at a greater risk of severe illness from COVID-19 at any
gestation.
Q. Is COVID-19 vaccination safe and effective in pregnant women?
The large clinical trials which showed that COVID-19 vaccines are
safe and effective did not include pregnant women. This means there is
limited information about the effects of COVID-19 vaccination in
pregnancy. A very small number of women became pregnant after they
received the vaccine in a trial. There was no sign of problems, but the
numbers are too small to be certain.
As the COVID-19 vaccines were not tested in pregnant women, we cannot
say for sure that they work as well in pregnant women as they do in
other adults. However, there is no reason to think that the vaccines
will not protect pregnant women effectively against COVID-19. Similarly,
there is no reason to think that the vaccine will have worse
side-effects in pregnant women.
There is limited UK data on COVID-19 vaccination and pregnancy.
However, robust real-world data from the United States – where around
90,000 pregnant women have been vaccinated mainly with mRNA vaccines,
such as Pfizer-BioNTech and Moderna – have not raised any safety
concerns.
Therefore, the JCVI advises that it is preferable for the
Pfizer-BioNTech or Moderna mRNA vaccines to be offered to pregnant women
in the UK, where available.
In non-pregnant individuals, the COVID vaccines are known to have
mild and short-lasting side effects, such as a fever or muscle ache
lasting a day or two. More recently, there have been reports of rare but
serious blood clots after vaccination. Up to 31st of March 2021, over
20 million doses of the AstraZeneca vaccine had been given in the UK (to
non-pregnant individuals). There have been 79 reports of serious
thrombosis (blood clots) following vaccination, meaning that about four
people have had these blood clots for every million doses of vaccine
given. There is therefore an extremely low risk of the serious side
effect of blood clots with this vaccine.
Regarding this, the JCVI has stated that "there are currently no
known risk factors for this extremely rare condition, which appears to
be an idiosyncratic reaction on first exposure to the AstraZeneca
COVID-19 vaccine". This means that someone is not necessarily at higher
risk of this serious side effect just because they have a higher risk of
other blood clots, for example because they are pregnant. Because this
side effect is so rare, however, and has not been reported in any
pregnant women, we can't know the exact risk in pregnancy.
Q. How can you say the COVID-19 vaccines won’t affect pregnancy when there isn’t any data?
In the absence of data, we cannot be 100% sure that vaccines will not
cause adverse events in pregnancy. However, this uncertainty needs to
be weighed against the risk of COVID-19 in pregnancy.
COVID-19 vaccines do not contain ingredients that are known to be
harmful to pregnant women or to a developing baby. Studies of the
vaccines in animals to look at the effects on pregnancy have shown no
evidence that the vaccine causes harm to the pregnancy or to fertility.
The COVID-19 vaccines that we are using in the UK are not ‘live’
vaccines and so cannot cause COVID-19 infection in you or your baby.
Vaccines based on live viruses are avoided in pregnancy in case they
infect the developing baby and cause harm. However, non-live vaccines
have previously been shown to be safe in pregnancy (for example, flu and
whooping cough). Pregnant women are offered other non-live vaccines,
such as those against flu.
There is limited UK data on COVID-19 vaccination and pregnancy.
However, robust real-world data from the United States – where around
90,000 pregnant women have been vaccinated mainly with mRNA vaccines,
such as Pfizer-BioNTech and Moderna – have not raised any safety
concerns.
Therefore, the JCVI advises that it is preferable for the
Pfizer-BioNTech or Moderna mRNA vaccines to be offered to pregnant women
in the UK, where available.
Q. What are the benefits of vaccination in pregnancy?
Vaccination is effective in preventing COVID-19 infection. More than
half of women who test positive for COVID-19 in pregnancy have no
symptoms at all but some pregnant women can get life-threatening illness
from COVID-19, particularly if they have underlying health conditions.
In the later stages of pregnancy women are at increased risk of
becoming seriously unwell with COVID-19. If this happens, it is about
three times more likely that your baby will be born prematurely, which
can affect their long-term health.
The benefits of vaccination include:
- reduction in severe disease for the pregnant woman
- reduction in the risk of prematurity for the baby
- potentially reducing transmission to vulnerable household members
Q. When in pregnancy can I have the vaccine?
The vaccine should work whatever the stage of pregnancy you are in.
The JCVI advises that women do not need a pregnancy test before
vaccination, and that women planning a pregnancy do not need to delay
pregnancy after vaccination.
However, as COVID-19 has more serious complications in later
pregnancy, some women may choose to delay their vaccine until after the
first 12 weeks (which are most important for the baby’s development) and
plan to have the first dose at any time from 13 weeks onwards.
As pregnant women are more likely to be seriously unwell and have a
higher risk of their baby being born prematurely if they develop
COVID-19 in their third trimester (after 28 weeks), women may wish to
have the vaccine before their third trimester.
Q. Does it matter which vaccine I have?
The latest information from JCVI advice published on 16 April 2021
advises that it is preferable for pregnant women in the UK to be offered
the Pfizer-BioNTech or Moderna mRNA vaccines, where available.
This is because these vaccines have been given to around 90,000
pregnant women in the United States and the data have not raised any
safety concerns.
Following the updated JCVI advice
issued on 8 April on the use of the AstraZeneca vaccine, the RCOG has
considered the impact of this information for pregnant women and those
undergoing fertility treatment.
If you have been offered COVID-19 vaccination, you should discuss the
benefits and risks with a healthcare professional, including discussion
of potential side effects. For pregnant women, those who have recently
had a baby or those about to start – or who have started – fertility
treatment, this discussion should cover the different types of vaccine
available, and possible side effects including the extremely rare side
effect of blood clots. The benefit/risk balance may be different for
those who are healthy and receiving the vaccine as a health or social
care worker, compared to those at increased risk of COVID-19
complications.
If a woman chooses to have a particular vaccine, for example to avoid
vaccination with the Oxford AstraZeneca vaccine, then they should be
able to choose to do so.
The JCVI statement
noted: ‘There are currently no known risk factors for this extremely
rare condition, which appears to be an idiosyncratic reaction on first
exposure to the AstraZeneca COVID-19 vaccine.’ The advice to offer an
alternative vaccine for those under 30 years old is based on the
relative benefits and risks of the vaccine in each age group, as
represented in the joint briefing slides.
Q. How is COVID-19 vaccination being monitored in pregnancy?
In the UK, healthcare professionals who meet a woman who has been
vaccinated in pregnancy should ensure this is centrally recorded to
their UK Obstetric Surveillance Service (UKOSS) reporter for the joint UKOSS/UKTIS study (for women vaccinated up to and including 31 March 2021).
Pregnant women who have been vaccinated (up to and including 31 March
2021) can report directly to UKTIS via their telephone line 0344 892
0909 (open 9-5pm Mon-Fri) or to:
Another reporting mechanism for healthcare professionals is the PHE Inadvertent Vaccination in Pregnancy (VIP) system.
Work is ongoing to ensure that pregnancy status is recorded in the
national vaccination programme to make sure pregnant women and their
babies’ outcomes can be followed up.
Q. Can I participate in a vaccine trial or vaccine study while I am pregnant?
There are currently plans for three trials of COVID-19 vaccines in
pregnant women. As of mid-April 2021, none of these studies have started
in the UK, so pregnant women cannot yet volunteer to be part of a trial
of COVID-19 vaccines in pregnancy.
- A study is planned by the vaccine manufacturer Janssen, and is called HORIZON1.
In that study, all the women who participate in the trial will receive
the vaccine (no one will get a placebo). This study aims to recruit 400
women worldwide (including about 50 in the UK). The HORIZON1 study is
currently paused while reports of rare blood clots with this vaccine are
investigated.
- Another study is planned in the UK by the vaccine manufacturer Pfizer,
and has already started in the US. Women who participate in this study
will be randomly assigned to receive either the vaccine or a placebo
(this is a randomised controlled trial, or RCT). The women who received
the placebo will then be offered the vaccine once they give birth, so
that all the women participating will have received the vaccine either
in pregnancy or shortly after giving birth. It is hoped that the UK part
of the trial will start in May 2021 at 14 sites across the country. The
Pfizer study aims to include 4,000 women worldwide, including 235 women
in the UK.
- There are plans for a pragmatic trial of different vaccines in
pregnant women, and full details of that trial will be available
shortly.
We will add more information on how to participate in these trials as it becomes available.
Q. Are breastfeeding women being offered COVID-19 vaccination?
The JCVI advice published on 30 December 2020 says there is no known risk in giving available COVID-19 vaccines to breastfeeding women.
Breastfeeding women will now be offered vaccination at the time when they become eligible.
Although there is lack of safety data for these specific vaccinations
in breastfeeding, there is no plausible mechanism by which any vaccine
ingredient could pass to your baby through breast milk. You should
therefore not stop breastfeeding in order to be vaccinated against
COVID-19.
Q. Should I have a COVID-19 vaccine if I plan to become pregnant?
The most recent JCVI advice says that women who are trying to become pregnant do not need to avoid pregnancy after vaccination.
If you are in one of the groups offered the vaccine, getting
vaccinated before pregnancy will help prevent COVID-19 infection and its
serious consequences. In some cases, women will need to make a decision
about whether to delay pregnancy until after the vaccine becomes
available to them.
The JCVI advice around vaccines in younger age groups should be
followed for those who are planning to get pregnant. This is currently
that non-pregnant individuals under the age of 30 without underlying
health conditions should be offered an alternative to the AstraZeneca
vaccine (if they are eligible for vaccination). Currently, the
alternatives are the Pfizer-BioNTech vaccine and the Moderna vaccine.
For non-pregnant individuals over the age of 30, or those with
underlying health conditions that make them more susceptible to
COVID-19, the JCVI recommends prompt vaccination, including with the
AstraZeneca vaccine.
Q. I am currently trying to get pregnant. I have had the first dose
of COVID-19 vaccination, should I delay pregnancy until after the second
dose?
One dose of COVID-19 vaccination gives you good protection against
infection, but it is thought that this is not long-lasting and may
not protect you for the whole of pregnancy. If possible, we recommend
that you complete the course of vaccination before you become pregnant.
If you find out you are pregnant after you have had one dose of the
vaccine (between doses), it is your choice to either have the second
dose after the recommended interval, to wait until after 12 weeks of
pregnancy (which are most crucial for the baby’s development) or defer
until after pregnancy. Your decision should take into account your
personal exposures to and risks from COVID-19. You can discuss these
risks with a doctor or your midwife, and you may want to use the RCOG and RCM decision tool to assist you in deciding what to do next.
Q. Does the COVID-19 vaccine affect fertility?
There is no evidence to suggest that COVID-19 vaccines will affect fertility.
There is no biologically plausible mechanism by which current
vaccines would cause any impact on women's fertility. Evidence has not
been presented that women who have been vaccinated have gone on to have
fertility problems.
Likewise, the theory that immunity to the spike protein could lead to
fertility problems is not supported by evidence. Most people who
contract COVID-19 will develop antibody to the spike and there is no
evidence of fertility problems in people who have already had COVID-19.
As more evidence becomes available on the safety of each vaccine
(from following up people for longer), we will update our advice.
More information on COVID-19 vaccines, fertility and fertility treatment is available from the British Fertility Society (BFS) and Association of Reproductive and Clinical Scientists (ARCS).
