Question: how effective is postinor 2 when ovulating?
Answer: Postinor-2 can be taken at any time during the menstrual cycle, unless the menstrual period is late. Postinor-2 has an 85% chance of preventing pregnancy. If taken within 24 hours, there is a 95% chance of preventing pregnancy. If taken after 48-72 hours, there is a 58% chance.