Association between use of macrolides in pregnancy and risk of major birth defects: nationwide, register based cohort study

Study (n=1,192,539; 13,019 exposed) reports use of macrolide antibiotics in pregnancy was not associated with an increased risk of major birth defects compared with women who did not use any antibiotics (relative risk ratio 1.05; 95% CI 0.95 to 1.17 per 1000 pregnancies).

British Medical Journal