Czech Study Finds Covid Vaccine Linked to One-Third Drop in Fertility Among Women

Czech Study Finds Covid Vaccine Linked to One-Third Drop in Fertility Among Women

A steady stream of reports is now developing that suggests Covid vaccinations may indeed hurt fertility and pregnancy outcomes.

I reported on a rat study that clearly showed fertility was impacted after the animals were injected with mRNA Covid vaccines. A recently published study (not peer reviewed yet) looking at data from Israeli women found a substantially higher-than-expected number of eventual fetal losses associated with Covid vaccination during gestational weeks 8-13.

A newly published peer-reviewed study analyzing nationwide data from the Czech Republic has reported a significant association between Covid vaccination and reduced fertility rates in women of childbearing age. The study, which examined approximately 1.3 million women aged 18–39 between January 2021 and December 2023, found that women who received the Covid vaccine before conception had a substantially lower rate of successful conceptions (“SC”, i.e., pregnancies that resulted in live births) compared to their unvaccinated counterparts.

The article, entitled Rates of Successful Conceptions According to COVID-19 Vaccination Status: Data from the Czech Republic, began by noting that adverse effects of COVID-19 vaccination on menstrual cycles have been documented, and there was limited population-level data on how vaccination might relate to birth rates. The researchers aimed to fill this gap by comparing SC rates between women vaccinated and unvaccinated against Covid before conception.

Researchers analyzed monthly data from January 2021 to December 2023, including vaccination status and live births for women in the target age group. SC rates per 1,000 women were calculated for both preconception-vaccinated and unvaccinated groups, as well as for the overall population.

The results were jaw-dropping:

• By the end of 2021, about 70% of women in this age group were vaccinated.
• From June 2021 onward, SC rates per 1,000 women were significantly lower for those vaccinated before conception than for unvaccinated women.
• The SC rate for vaccinated women was much lower than expected based on their share of the population (i.e., a 33% or one-third decrease).
• In 2022, SC rates stabilized, but remained approximately 1.5 times higher in unvaccinated women compared to vaccinated women

By 2022, a stark difference was clear.

The vaccinated cohort averaged around 4 successful conceptions per 1,000 women per month.

That’s a staggering 33% LESS than the 6 per 1,000 seen in the unvaccinated group. pic.twitter.com/rStvvdz4jy

— The Vigilant Fox 🦊 (@VigilantFox) June 25, 2025

While the findings suggest a sustained association between covid vaccination prior to conception and lower SC rates, it must be noted that the study does not establish causality. Possible explanations include self-selection bias (e.g., women planning pregnancy may have avoided vaccination), but this does not fully account for the observed trends, as overall fertility rates also declined during the period.

The authors also point out additional limitations, including a lack of data on confounders like age, socioeconomic status, health, and fertility intentions.

That being said, the results are preliminary and hypothesis-generating, highlighting the need for further research into the potential effects of covid vaccination on human fertility. However, until these studies are conducted with no Big Pharma bias nor conducted in ways that are designed to promote the preferred political bias, all women should weigh these recent reports as part of their personal risk assessment.

Truly, personal risk assessment has never been more critical. Covid cases now resemble a bad cold in most healthy people. Women of childbearing age and parents of young girls should weigh seriously the real-world consequences of infection against the potential loss of fertility.

As Hot Air’s David Strom observes, pushing the vaccines when any of this was suspected is a crime against humanity.

How many women will be robbed of fertility? It is impossible to say. What we do know is that each and every one of them was lied to in a manner that we define as a crime against humanity. We also know that in cases asymptotically close to zero, the women did not benefit from the vaccine. They were at almost no risk from COVID, and now they have lost their future children.

The government-generated mass panic was evil. The forced closures of much of our economy were evil. The “comply or die” measures were evil. School closures were evil. Setting people against each other was evil. The forced vaccinations were evil. The lies were evil.

This study should be front-page news, and talked about 24/7/365 until people get it through their heads that the people who run our lives are not “experts,” but budding tyrants so drunk with power that they experimented on every person in the world without worrying about the damage they could do.

And over at Ace of Spades HQ, there is a reminder that any of us who tried to express these concerns were silenced.

People screamed that this entirely untested, experimental gene-slicing “vaccine therapy” could have serious consequences that were entirely unknown.

They were chased off the internet and subjected to government punishment.

“Trust us,” they said. “We’re the Experts and we’re here to play savior.”

Moreover, birth rates in the Czech Republic dropped from 1.83 per 1,000 women in 2021 to 1.37 in 2024, adding further evidence that the COVID-19 vaccines may be contributing to the decline in fertility. pic.twitter.com/Flv7OfyHQI

— The Vigilant Fox 🦊 (@VigilantFox) June 25, 2025

My hope is that all the damage caused by the Covid pandemic policies can eventually be undone. Until then, I am bracing for more troubling findings from serious researchers willing to ask the hard questions and bravely present their analyses.

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