Pregnant COVID vaccine: true and false

Vaccin contre la COVID enceinte : le vrai du faux

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 breast-feeding?

More than a year after the start of the pandemic, and just a few months after vaccination against Covid19 began in France, many of you are asking questions about vaccination against COVID for pregnant or breast-feeding women. Today, Léa, pharmacist and author of the Instagram account gives some information so you can make a decision.

What does a pregnant woman catching COVID risk?

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

Is there a greater risk of adverse reactions in pregnant women who are vaccinated?

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 reactions 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 breast-feeding mothers, as well as through the umbilical cord. However, this remains a passive immunity, i.e. it's a temporary immunity.

Does the COVID vaccine affect fetal development?

To date, vaccination has not caused any toxicity for the fetus, or for the course of the pregnancy. If you have any questions on this subject, please visit, where you'll find a summary of all the studies.

Are there any long-term adverse effects to be feared 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 messenger RNA injected has already been eliminated. So no long-term adverse effects are to be expected.

Does messenger RNA technology modify DNA?

The messenger RNA vaccine in no way alters the DNA of the person injected. That's why, based on current studies, there is no risk to the fetus or to a healthy 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, based on the hypothesis 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 a vaccination center.

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

If you find out you're pregnant after you've just 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 time limit between getting vaccinated 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 pants for your 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.