One report found that 15 pregnant patients died of covid-related causes between March 2020 and early October, including nine who died after delta became the most prominent strain. All but one of the women who died had underlying health conditions, and none had been fully vaccinated. The second report found that the risk of stillbirth increased about fourfold for women with covid-19 as delta surged.
The reports’ authors emphasize the importance of preventive measures including vaccination, which the CDC recommends for pregnant people. Only about 30 percent of pregnant Americans are vaccinated, a rate far lower than the population as a whole.