Research report: What studies really say about fertility, pregnancy, placenta and children born after vaccination
A particularly striking claim has been circulating on the internet and social media in recent days: that approximately 1,25 billion women vaccinated against Covid-19 are going to give birth to a "kind of human that has never existed before."
The wording is shocking.
But the question is very specific:
Is there scientific research that proves this?
Based on the available scientific data and the official positions of major health organizations, the answer is no.
There is currently no reliable published scientific study that has concluded that the children of vaccinated women constitute some new biological "species of human," nor that vaccination alters the human genome in a way that creates a new category of people.
Where does fear come from?
The debate has been fueled by research examining how long mRNA or its derivatives last in the body and whether vaccine components or the immune response can be localized to different tissues.
These are legitimate scientific questions.
However, studying the biodistribution of a vaccine is one thing and drawing the conclusion that a "new human species" is being created is another.
To support such a claim there would have to be strong evidence of permanent heritable genetic change in reproductive cells and in subsequent generations.
Such evidence has not been presented.
What is mRNA? and what it doesn't do
mRNA vaccines use a temporary genetic message that instructs cells to produce a SARS-CoV-2 antigen for a short period of time and activate the immune system.
mRNA is not DNA.
It does not need to enter the cell nucleus to work, and there is no documented mechanism by which approved mRNA vaccines systematically convert human DNA into a heritable form.
This is crucial when discussing the phrase "new kind of human."
The creation of a new human species is not a term used in medical literature for children born to vaccinated mothers.
What does the fertility data show?
The concern that Covid-19 vaccines may cause infertility has existed since the early days of vaccination programs.
Since then, data has been collected from millions of people.
The CDC reports that there is no evidence linking Covid vaccines-19 with fertility problems in women or men.
Studies in couples trying to conceive did not show a reduced chance of conception after vaccination.
Similarly, studies in women undergoing in vitro fertilization found no significant differences in embryo development or pregnancy rates between vaccinated and unvaccinated women.
New major research in Sweden
In 2026, data were published from a large Swedish analysis that examined almost 60.000 women aged 18 to 45.
About three-quarters had been vaccinated against Covid-19, mainly with mRNA vaccines.
The researchers compared births and miscarriages between vaccinated and unvaccinated women.
The result:
No statistically significant difference was found in either births or miscarriages attributable to vaccination.
This particular study is particularly important because it examines real population data several years after vaccinations began.
What does the World Health Organization say in 2026?
The World Health Organization updated its information on Covid-19 vaccines in May 2026.
The WHO states that there is no evidence that vaccines negatively affect future fertility.
For pregnant women in the groups where vaccination is recommended, the organization states that immunization can protect both the mother from serious disease and the infant through the transfer of maternal antibodies.
This is exactly what is important:
Detection of antibodies in the newborn does not mean genetic modification of the child.
The transfer of antibodies from mother to fetus is a normal mechanism of pregnancy and also occurs with other infections and vaccines.
Are there side effects?
Yes.
Like any pharmaceutical product, Covid-19 vaccines have real and documented side effects.
The scientifically correct stance is not to claim that "vaccines never have side effects."
They have.
For example, a rare risk of myocarditis and pericarditis has been identified, primarily in younger men, after certain mRNA vaccines. There have also been specific rare complications associated with certain vaccines of different technologies.
Side effects must be recorded, studied and made public.
But it's one thing to have documented side effects, and quite another to assume that billions of women will create a new human biological category.
There is currently no evidence for the second.
What about changes in the menstrual cycle?
Here the picture is more interesting.
Studies have documented in some women minor and usually temporary changes in the menstrual cycle after vaccination.
This has been the subject of real scientific research.
The observed changes, however, do not equate to infertility and to date have not been proven to be an indication of permanent damage to reproductive function.
It is a typical example of why caution is needed:
A real scientific finding can easily be turned on social media into a much larger and unproven claim.
And the reduced birth rates after the pandemic?
Another argument used is the drop in birth rates in several countries after the pandemic.
The decline is real in many states.
However, it does not in itself constitute proof of the effectiveness of vaccines.
Demographic changes are influenced by many factors: cost of living, housing, childbearing age, financial insecurity, changes in relationships and marriage, delayed family formation, and the social consequences of the pandemic.
To prove that a vaccine is responsible for a decrease in births, a comparison of vaccinated and unvaccinated groups is required, controlling for all these factors.
The large studies that have been conducted to date do not prove such a causal relationship.
The question worth investigating
The science surrounding Covid-19 is not closed.
The effects of the infection itself, repeated infections, vaccines, and different vaccination technologies will continue to be researched for many years.
And this is completely normal.
Science should not be afraid of questions.
But neither should it turn a hypothesis into a certainty before there is evidence.
The claim that "1,25 billion vaccinated women will give birth to a type of human that has never existed before" is not supported by the available scientific data.
To date, the large body of evidence on fertility, pregnancy and births does not show that the Covid-19 vaccination creates a new biological category of people or that it causes generalized reproductive harm.
This does not mean that the research stops.
It means exactly the opposite.
We continue to research — but we separate what has been proven from what is merely claimed.
Πηγές
Centers for Disease Control and Prevention (CDC) – COVID-19 Vaccination for Women Who Are Pregnant or Breastfeeding, updated February 2026.
World Health Organization (WHO) – COVID-19 Vaccines: Questions and Answers, updated May 2026.
CDC – COVID-19 Vaccination for People Who Would Like to Have a Baby.
Large Swedish population study of nearly 60.000 women on vaccination, birth
