Two observational studies suggest spontaneous abortion is not increased following COVID-19 mRNA vaccination during pregnancy.

Study 1: Spontaneous Abortion Following COVID-19 Vaccination During Pregnancy – JAMA

Study 2: Receipt of mRNA Covid-19 Vaccines and Risk of Spontaneous Abortion – New England Journal of Medicine

Commentary on Twitter

? NO LINK BETWEEN MISCARRIAGE & COVID VACCINATION

This @JAMA_current study examined 105446 pregnancies, including 13160 miscarriages

Women with pregnancies ending in miscarriage were NOT more likely to have had ? in prior 28 days than those that didnthttps://t.co/7cFELq1oPM

— Ilan Schwartz MD PhD (@GermHunterMD) September 8, 2021