Uploaded August 2025 | Updated September 2026, 2 weeks ago
Rates of successful conceptions according to COVID-19 vaccination status: Data from the Czech Republic
journals.sagepub.com/doi/10.1177/09246479251353384
Vibeke and team, crowd funding, Me again - here is link to our crowdfunding - it would be great if you would link.
buymeacoffee.com/batchdependency
Observed
Adverse effects of COVID-19 vaccination on human menstrual cycle characteristics
Limited data, relationship, COVID-19 vaccination status and birth rates.
Objectives
Nationwide data from the Czech Republic
Rates of successful conceptions (SCs)
(conceptions leading to live births 9 months later)
For women who were either vaccinated or unvaccinated against COVID-19 before SC.
Summary monthly COVID-19 vaccination and birth data
Women in the Czech Republic aged 18–39
January 2021 to December 2023.
Results
1,300,000 women aged 18–39 years in the Czech Republic
Proportion of COVID-19-vaccinated women increased from January 2021 until reaching a steady state of around 70% by the end of 2021.
At least from June 2021, SCs per 1000 women were considerably lower for women who were vaccinated,
compared to those that were unvaccinated, before SC.
SC rates for the vaccinated group were much lower than expected based on their proportion of the total population.
Conclusions
SC rates were substantially lower for women vaccinated against COVID-19 before SC than for those who were not vaccinated.
These hypothesis-generating and preliminary results call for further studies of the potential influence of COVID-19 vaccination on human fecundability and fertility.
Rates of successful conceptions according to COVID-19 vaccination status: Data from the Czech Republic
journals.sagepub.com/doi/10.1177/09246479251353384
Vibeke and team, crowd funding, Me again - here is link to our crowdfunding - it would be great if you would link.
buymeacoffee.com/batchdependency
Observed
Adverse effects of COVID-19 vaccination on human menstrual cycle characteristics
Limited data, relationship, COVID-19 vaccination status and birth rates.
Objectives
Nationwide data from the Czech Republic
Rates of successful conceptions (SCs)
(conceptions leading to live births 9 months later)
For women who were either vaccinated or unvaccinated against COVID-19 before SC.
Summary monthly COVID-19 vaccination and birth data
Women in the Czech Republic aged 18–39
January 2021 to December 2023.
Results
1,300,000 women aged 18–39 years in the Czech Republic
Proportion of COVID-19-vaccinated women increased from January 2021 until reaching a steady state of around 70% by the end of 2021.
At least from June 2021, SCs per 1000 women were considerably lower for women who were vaccinated,
compared to those that were unvaccinated, before SC.
SC rates for the vaccinated group were much lower than expected based on their proportion of the total population.
Conclusions
SC rates were substantially lower for women vaccinated against COVID-19 before SC than for those who were not vaccinated.
These hypothesis-generating and preliminary results call for further studies of the potential influence of COVID-19 vaccination on human fecundability and fertility.
