Concurrent use of hormonal long-acting reversible contraception by women of reproductive age dispensed teratogenic medications, Australia, 2013-2021: a retrospective cohort study.

Concurrent use of highly effective hormonal contraception at the time of first dispensing of category X medications is low in Australia, raising concerns about potential fetal harms during unintended pregnancies. Awareness of the importance of hormonal contraception and its uptake by women prescribed category X medications should be increased.