Dosing of Mifepristone and Misoprostol for Medical Abortion

The abortion pill is very effective. The effectiveness depends on how far along you are in your pregnancy when you take medicine.

For people who are 8 weeks pregnant or less, one kit (Mifepristone 200mg + Misoprostol 800 mcg) works about 94-98 out of 100 times.
For 8–9 weeks pregnant people, one kit (Mifepristone 200mg + Misoprostol 800 mcg) works about 94-96 out of 100 times.
For 9–10 weeks pregnant people, one kit (Mifepristone 200mg + Misoprostol 800 mcg) works about 91-93 out of 100 times. If given an extra dose of medicine, it works about 99 out of 100 times.
For 10–11 weeks pregnant people, one kit (Mifepristone 200mg + Misoprostol 800 mcg) works about 87 out of 100 times. If given an extra dose of medicine, it works about 98 out of 100 times.

Author

Dr. Kopp Kallner. M.D. in Obstetrics & Gynecology, Columbia University Medical School.