First study to detect Delta variant of SARS-CoV-2 in maternal bloodstream and placenta in cases of stillbirth and pregnancy complications

Data indicate that pregnant women with COVID-19 had an increased risk for stillbirth when the Delta variant of the SARS-CoV-2 virus was the dominant strain in the United States. Researchers identified the Delta variant in the blood and placentas of several women with COVID-19 who had stillbirths and pregnancy complications.