Pregnant COVID vaccine: true and false

Pregnant COVID vaccine: true and false

Disclaimer: This video is intended to inform you about the effects of the messenger RNA vaccine from a scientific point of view. The choice of whether or not to be vaccinated against COVID-19 is yours!



Covid vaccine: Can I be vaccinated against COVID if I'm pregnant or breastfeeding?

More than a year after the start of the pandemic, and a few months after the start of Covid19 vaccination in France, many of you have questions about COVID vaccination in pregnant or breastfeeding women. Today, Léa, pharmacist and author of the Instagram account gives some information so you can make a decision. 

What does a pregnant woman risk if she catches COVID?

A pregnant woman who catches COVID has a greater risk of developing a severe form of coronavirus, as well as venous thrombosis (the formation of a blood clot that obstructs a vein in different parts of the body).

Is a pregnant woman who is vaccinated more likely to have adverse reactions?

Studies have been carried out on over 4,000 women in the United States, and it has not been proven that a pregnant woman who is vaccinated has a greater risk of adverse effects than a woman who is not pregnant.

Can a vaccinated mother pass on immunity to her baby?

There have been several reports on this subject. We have observed the passage of antibodies in breast milk for nursing mothers, as well as through the umbilical cord. However, this remains a passive immunity, meaning that it is temporary.

Does the COVID vaccine affect fetal development?

To date, vaccination has shown no toxicity for the fetus, or for the course of pregnancy. If you have any questions on this subject, please visit, where you'll find a summary of all the studies.

Should we be concerned about long-term adverse effects from the COVID vaccine?

To date, the messenger RNA vaccine offered to pregnant women does not persist in the body, since after ten hours, half of the injected messenger RNA has already been eliminated. We can therefore expect no long-term adverse effects.

Does messenger RNA technology modify DNA?

The messenger RNA vaccine in no way modifies the DNA of the person receiving the vaccine. That's why, according to current studies, there is no risk to the fetus or to the pregnancy.

#fake news about the vaccine: Does the COVID vaccine make you sterile?

Fake news about the Covid vaccine has been circulating. It claimed that the Covid-19 vaccine could render a pregnant woman sterile, on the assumption that the antibodies produced would attack a protein in the placenta. This has never been proven. On the contrary: studies in the USA have shown that ovarian function is not altered in vaccinated women.

At what stage of pregnancy should a pregnant woman be vaccinated against COVID?

Today, vaccination of pregnant women is recommended from the second trimester onwards at vaccination centers.

What happens if I get vaccinated and find out I'm pregnant?

If you find out that you're pregnant after having been vaccinated, don't worry: there is no risk associated with this vaccination. You can take your second dose according to the vaccination schedule established in France.

If I'm planning a pregnancy, when should I get vaccinated?

If you're planning a pregnancy, there's no delay between the vaccine and wanting a baby. Once again, you can find all this information at

Léa's little plus

My advice as a doctor of pharmacy: whether or not you want to be vaccinated, a good level of vitamin D ensures the right immune response, i.e. that your immune system doesn't overreact, either in the event of infection with COVID or following vaccination.


During your pregnancy, and even post-partum, we recommend our menstrual briefs for comfort!

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The information contained in the articles on is general information only. Although reviewed by health professionals, this information is not error-free, does not constitute health advice or consultation, and is not intended to provide a diagnosis or suggest a course of treatment. Under no circumstances may this information be used as a substitute for medical advice or consultation with a healthcare professional. If you have any questions, please consult your doctor.