The Truth Behind the Misinformation: COVID-19 Vaccines and Pregnancy Safety

In the ongoing political and social fallout from the COVID-19 pandemic, a new wave of misinformation has erupted, this time targeting the safety of vaccines for pregnant women. The controversy began when Republican senators Ron Johnson of Wisconsin and Rand Paul of Kentucky released a trove of private text messages obtained from Dr. Anthony Fauci’s former government phone. Within these messages, they highlighted a passing, speculative remark Fauci made in January 2021 about a “theoretical” risk of miscarriage from a second vaccine dose. This single, taken-out-of-context fragment of a private conversation has been weaponized by critics to cast doubt on vaccines that have been proven time and again to be profoundly safe for mothers and their unborn children. The release was designed to undermine public trust, and it has unfortunately succeeded in generating a fresh wave of fear and confusion across social media platforms. However, medical experts, obstetricians, and public health institutions have responded with overwhelming clarity: the COVID-19 vaccines are safe during pregnancy, and the fear being spread is based on a gross statistical manipulation and a fundamental misunderstanding of scientific research. The real tragedy is that this misinformation is not just an academic debate; it has life-or-death consequences for vulnerable expectant mothers who may now hesitate to receive a shot that could protect them from a devastating, potentially fatal illness.

The falsehood stems from a legitimate, peer-reviewed study published in the New England Journal of Medicine (NEJM) in April 2021. The initial data from that study involved a COVID-19 vaccine safety monitoring system that tracked outcomes for nearly 4,000 pregnant women who received the vaccines early in the rollout. Within that group, researchers identified 827 women who had a “completed pregnancy”—meaning they had given birth or experienced a loss. The outcomes were 712 live births, 104 spontaneous abortions (miscarriages), and 11 other outcomes. This raw data yielded a miscarriage rate of 12.6% (104 out of 827). Crucially, this percentage is perfectly aligned with the general population’s baseline miscarriage rate, which the Mayo Clinic and other leading institutions place between 10% and 20%. Yet, this finding was twisted. Malicious actors took the raw number of 104 miscarriages and divided it by a smaller, misleading subset: the 127 pregnancies that had been completed in the first or second trimester (excluding the 700 third-trimester pregnancies). This bogus calculation produced the alarming 82% figure that is now circulating online, designed to terrify expectant mothers. The original researchers were forced to issue a correction in September 2021, clarifying that their study did not have enough follow-up data to calculate a definitive risk estimate, precisely because the follow-up time was too short to capture all potential miscarriages and the participant pool was disproportionately composed of late-term pregnancies.

The correction issued by the NEJM study authors is crucial to understanding the true safety profile of the vaccine. They explicitly stated that “no denominator was available to calculate a risk estimate for spontaneous abortions.” In simpler terms, the 82% figure is a statistical fallacy. Miscarriages overwhelmingly occur in the first trimester (before 13 weeks). Because the majority of the 827 completed pregnancies in the study (700 of them) were in the third trimester, they simply did not represent the demographic where miscarriage risk is highest. Excluding them to create a denominator of 127 is scientifically invalid because those 700 women had already passed the period of highest risk. Furthermore, a significant portion of the 4,000 women in the trial had not yet reached the point of delivery or loss when the data was first analyzed, meaning the true denominator was far larger. The researchers emphasized that the data was preliminary and that calculating a miscarriage rate from the available numbers was simply not possible without misrepresenting the facts. This is a classic case of distorting correlation, timing, and raw numbers to fit a predetermined, harmful narrative. It takes a snapshot of incomplete data, removes the majority of the sample, and presents a mathematically skewed percentage as a definitive fact, ignoring the glaring caveats that the scientists themselves explicitly included in their published work. The scientific community was quick to point out that this is not a case of scientists hiding dangerous information; it is a case of political actors cherry-picking data to manufacture a crisis that does not exist.

The response from leading medical authorities has been unambiguous and resolute. Dr. Kevin Ault, an obstetrician-gynecologist and president-elect of the U.S. National Foundation for Infectious Diseases, explained on CNN that the fears are completely unfounded. “This is a well-studied area. We knew this in 2021, that there wasn’t an increased risk, and now we have five more years of data. So it’s hard to believe we would miss a factor of eight increase in miscarriages,” Ault stated. His point is incisive: if the vaccine genuinely increased miscarriage risk by 82%, medical science would have detected it long ago across the millions of pregnancies that have occurred since the shots became widely available. The sheer scale of real-world data would have exposed such a dramatic and obvious danger almost immediately. Similarly, Dr. Brenna Hughes, chair of the Society for Maternal-Fetal Medicine, emphasized the sheer volume of accumulated evidence. “It is without question that the benefits of the vaccine outweigh the risks, and the world’s literature on this topic includes hundreds of thousands of women,” Hughes said. She underscored that the recommendation is not a whimsical opinion but a consensus built on rigorous, peer-reviewed data. The U.S. Centers for Disease Control and Prevention (CDC) echoes this sentiment, explicitly stating that “COVID-19 vaccination before and during pregnancy did not increase health risks for pregnant women or their babies,” and further affirming that vaccination provides protective antibodies to the newborn, offering a shield of immunity in the crucial first months of life.

Perhaps the most critical piece of context that gets lost in the misinformation storm is the actual, quantifiable danger that COVID-19 poses to pregnant women. Unvaccinated pregnant women who contract the virus are at a dramatically higher risk of severe outcomes compared to their non-pregnant counterparts. Dr. Hughes highlighted this stark reality, noting, “We had hundreds of maternal deaths in 2021 due to Covid, and we still have severe illnesses, ICU stays, stillbirth, preterm deliveries related to those respiratory diseases.” The virus itself is far more dangerous to the fetus and mother than the vaccine. Infection can lead to placental damage, which directly causes intrauterine fetal demise, as well as maternal respiratory failure requiring intubation and mechanical ventilation. These complications are real, documented, and devastating. By contrast, the vast majority of vaccine side effects are minor—a sore arm, mild fatigue, a low-grade fever that can be managed with over-the-counter medication. Dr. Ault further reinforced this point, stating, “Vaccination during pregnancy reduces the risk of all those things. So if somebody’s making decisions on these bad sources of information, that has a real downstream effect on maternal health.” The risk-benefit analysis is not a close call; it is overwhelmingly in favor of vaccination. Choosing to avoid the vaccine based on a fabricated statistic means choosing to face a disease that has killed thousands of pregnant women, rather than a safe and effective tool that prevents severe illness and protects both mother and child.

For expectant mothers, these conflicting headlines are terrifying. Scrolling through social media and seeing a headline screaming “82% miscarriage risk” can trigger anxiety, doubt, and panic, especially during a time already filled with emotional vulnerability. It is heartbreaking to think that a mother might forgo a life-saving vaccine because of a deliberate misreading of a published study. Dr. Hughes acknowledged this anxiety, speaking to the fundamental questions every pregnant person asks their doctor: “When we offer any intervention in pregnancy, the first question is: ‘Is it safe for me? Is it safe for the baby?'” The answer, based on hundreds of thousands of cases, is a resounding yes. The tragedy is that misinformation exploits this natural fear, weaponizing it for political gain. The release of private text messages and the subsequent distortion of scientific data have real-world consequences. They erode trust in the medical establishment, leave vulnerable women unprotected, and put their lives and the lives of their children at risk. As Dr. Hughes notes, the guidelines are not made by one person in a vacuum; they are the result of “a committee of people with decades of expertise” who rigorously assess the science. The next time a sensational claim appears in your feed, the experts urge you to look past the algorithm and consult the actual, peer-reviewed literature, or simply ask your obstetrician. Your doctor, your healthcare team, and the CDC all agree: the vaccine is safe, it is effective, and the true danger lies in the virus, not the shot. In the end, this is not a political issue—it is a matter of public health, maternal welfare, and the protection of the most vulnerable among us. Trust the science, not the soundbite.