As per the article: https://www.bellybelly.com.au/birth/...uction-methods

3. Evening Primrose Oil (EPO)
Evening Primrose Oil is another ‘cervix ripening’ method. EPO helps by imitating prostaglandin can be used orally and/or internally.

A usual oral dosage is 2-3 of 500mg capsules daily from 36 weeks. If you are taking EPO internally, you can do this from 36 weeks – simply insert 2-3 capsules directly to the cervix before bed. You might like to wear a pad or liner as it can get messy when you get up.