evidence: Federal vaccine monitoring systems have identified no safety concerns with the COVID-19 vaccines for pregnant people. Preliminary Centers for Disease Control and Prevention data show that miscarriage is not more frequent than expected in vaccinated people. Online posts, however, falsely contend that such data, as reported in a CDC publication, show an 82% miscarriage rate. There is no evidence that the authorized COVID-19 vaccines pose a risk to pregnant people and their fetuses. Although pregnant people were not actively included in the clinical trials conducted prior to authorization, subsequent information about those who became pregnant during the trials and safety surveillance data following the vaccines’ rollouts thus far have indicated the immunizations are safe. [...] The New England Journal of Medicine article from which the faulty percentage is derived reported on the preliminary findings of the government’s two primary vaccine safety monitoring systems — v-safe, a smartphone-based health checker run by the CDC, and the Vaccine Adverse Event Reporting System — for pregnant people who had received the Pfizer/BioNTech or Moderna vaccines. It concluded there were no "obvious safety signals among pregnant persons who received mRNA Covid-19 vaccines," while acknowledging that additional follow-up of pregnant women, especially those vaccinated early in pregnancy, was needed.