What Are ‘Missed Period Pills,’ and How Do They Work?

Cari Siestra first learned about menstrual regulation when they were working on the Myanmar-Thailand border. At the time, abortion was broadly criminalized in both countries. But if a person’s period was late, it was relatively easy to get access to pills that would induce menstruation in just a few days. In Bangladesh, where abortion is largely illegal, menstrual regulation is available up to 10 weeks after a missed period, and public health advocates routinely talk about it as a promising way to reduce maternal mortality and rates of unsafe abortion.

Menstrual regulation isn’t…