The Swiss Agency for Therapeutic Products, Swissmedic, has investigated the link between low birth rates and vaccination against Covid-19. Result: There is no scientific evidence that mRNA vaccines can affect human fertility.
Swissmedic conducted the study into a possible link between fertility and Covid-19 vaccination together with ten partner authorities in other countries. It was emphasized that this included a population of approximately 800 million inhabitants. Changes in the birth rate have been observed in some countries, both in relation to the moment of the pandemic and the start of the vaccination campaign. In Sweden and in the German-speaking countries, for example, the birth rate rose sharply at the start of the pandemic, before falling sharply in early 2022.
In these countries, the reason for the decline is that a possible desire to have children was postponed because it was feared that the vaccination would have a negative effect on fertility, according to Swissmedic. A working paper from the German Federal Institute for Population Research cites both the health crisis and associated economic uncertainties as the cause of the decline in birth rates.
Fertility rates fell before vaccination campaigns
In contrast, in other countries, such as Spain, Japan, the United Kingdom or the US, a significant decline in fertility rates was observed only nine months after the start of the pandemic – ie before the start of the vaccination campaign. Since the development of these so-called fertility rates is very different in different countries, a causal link between vaccination and fertility seems hardly demonstrable, Swissmedic wrote.
Neither the published literature nor global market surveillance has provided any evidence of a link between vaccination and infertility.
Covid-19 infection can reduce fertility
However, individual studies have pointed out that not vaccination, but a Covid-19 infection in men can temporarily reduce fertility. There is evidence of reduced sperm production, erectile dysfunction or testosterone deficiency in men infected with the coronavirus. After an infection, the chance of pregnancy drops quickly in some cases. It then took at least 60 days for these men to be as fertile as uninfected people.
Source: Krone
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