The US CDC conducted a study that led to its recommendation that the Covid vaxxes are safe during pregnancy, so that consequently pregnant women can be vaccinated. There is anecdotal evidence that there has a significant increase in miscarriages among vaccinated women, including a recent military study, but the CDC study has been cited to show that such concerns are misplaced. However, as detailed in a critical article by Children’s Health Defense.com, the CDC study had numerous methodological problems. The most important is the small number of vaccinated mothers who received a vaccine in the first trimester in this study. The risk of adverse outcomes (such as birth defects, miscarriages) in pregnancy is greatest during the first third of pregnancy. This is a time when crucial embryonic structures are developing, and thus the period of time where maternal health is particularly important. But, only 172 of more than 10,000 (1.7 percent) vaccinated mothers in the study received a vaccine in the first trimester, rendering the research, for this reason alone, methodologically problematic.
