Each year, a large proportion of pregnant women experience insomnia during pregnancy, placing them at increased risk of negative obstetrical outcomes, elevated depression and anxiety, and poor infant sleep. However, pregnant women are reluctant to take medications for insomnia, leaving them without evidence-based treatment options. Cognitive behavioural therapy for insomnia (CBT-I) combines cognitive and behavioural principles to mitigate insomnia symptoms and has proven to be an effective treatment for insomnia in a number of other populations.