Vaccinating against Covid does not increase the risk of miscarriage or birth defects, officials from the Centers for Disease Control and Prevention said.

The CDC tracked 1,613 pregnant women who received a Covid-19 vaccine, 30% of whom were vaccinated in the second trimester, while the remaining 70% received their inoculations in the third trimester, Dr. Christine Olson, a CDC medical officer, told the agency’s Advisory Committee on Immunization Practices on Wednesday.

Those participants gave birth to 1,634 infants, including 42 twins.

“We reviewed the currently available registry data and found no evidence of an increase in spontaneous abortion rates, and no evidence of any disproportionate negative infant birth outcomes,” Olson said.