A recent study reported that of 4500 women who underwent dental X-rays during pregnancy, 1117 had low-birth-weight babies

Writing Nov 12, 2020

A recent study reported that of 4500 women who underwent dental X-rays during pregnancy, 1117 had low-birth-weight babies. The researchers concluded that women who have dental X-rays during pregnancy face an increased risk of having underweight babies. What questions might you want to ask about this research before accepting their conclusion?