The study found that atrioventricular septal defects (AVSD)—a serious congenital heart defect involving holes between the heart’s chambers—were observed in 2.3% of babies whose mothers were vaccinated during the first trimester, compared with 0% among babies of unvaccinated mothers.
They also found cleft palate in 0.8% of babies exposed during the first trimester, compared with 0% among babies of unvaccinated mothers.
