January 23, 2026
Fact Check: Does the COVID-19 Vaccine Cause Infertility?
The claim linking the Pfizer-BioNTech vaccine to infertility is unfounded, with experts confirming no data supports this theory. The FDA explicitly allows pregnant and breastfeeding women to receive the vaccine, and the vaccine’s mRNA technology does not target placental proteins.
Key Takeaways
Origins of the Infertility Claim and Expert Rebuttals
The claim originated from a British former Pfizer employee and a German doctor, both known for downplaying the pandemic. Experts refute this by emphasizing the absence of scientific evidence and the vaccine’s lack of placental proteins.
FDA Guidance on Vaccination for Pregnant and Breastfeeding Women
The FDA authorized the Pfizer vaccine for pregnant and breastfeeding individuals in its initial rollout. Clinical trials and safety data support its use in these groups, with no reported fertility issues.
Scientific Evidence Refuting Vaccine-Infertility Link
The Pfizer vaccine’s mRNA technology instructs cells to produce a coronavirus spike protein, which shares minimal similarity with placental proteins. Human biology evolved to prevent autoimmune attacks on critical tissues.
Comparative Safety of mRNA and Viral Vector Vaccines
mRNA vaccines (Pfizer, Moderna) and viral vector vaccines (AstraZeneca) are both considered safe. Viral vector technology, used in Ebola vaccines, has a proven safety profile in pregnancy.
Recommendations from Fertility and Obstetric Organizations
The American College of Obstetricians and Gynecologists (ACOG) and the American Society for Reproductive Medicine (ASRM) urge vaccination for patients planning pregnancy, undergoing fertility treatments, or who are pregnant.
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