Table 1 Accidental pregnancies in trials for the COVID-19 vaccines approved in the United Kingdom

From: Are COVID-19 vaccines safe in pregnancy?

Vaccine type Control group Vaccinated group Ref.
Participants Pregnancies Miscarriages (rate) Participants Pregnancies Miscarriages (rate)
Pfizer/BioNTech 18,846 12 1 (8%) 18,860 11 0 (0%) 4
Moderna 15,170 7 1 (14%) 15,181 6 0 (0%) 5
AstraZeneca 5,829 9 3 (33%) 5,807 12 2 (17%) 6