Girls who provoke medical abortion however choose to cease within the center of remedy could also be in danger for severe blood loss, a UC Davis Well being examine finds. Researchers discovered that is true even for girls who use an experimental remedy that claims to “reverse” the results of the abortion capsule. The examine, printed right this moment in Obstetrics and Gynecology, gives vital insights into the security of utilizing excessive doses of progesterone throughout early being pregnant to attempt to cease a medical abortion.

Medical abortion entails utilizing two medicines in sequence: mifepristone and misoprostol. This mix is authorized by the Meals and Drug Administration (FDA) for medical abortion in the course of the first 70 days of being pregnant. When mifepristone is adopted in 24-48 hours by misoprostol, the abortion routine is very efficient and protected.

The primary randomized medical examine on medical abortion “reversal”

Anti-abortion activists declare that ladies who take mifepristone for abortion and alter their thoughts earlier than utilizing misoprostol can take progesterone to cease the abortion course of. The UC Davis Well being examine is the primary rigorous medical examine to check the efficacy of progesterone after mifepristone. The method of reversing mifepristone’s binding to progesterone receptors is referred to medically as mifepristone antagonization.

Earlier than this examine, the medical literature on mifepristone reversal consisted of case stories and sequence, which don’t present proof on whether or not progesterone remedy is efficient or protected. None of the case stories describe security or the outcomes of girls who didn’t have the being pregnant proceed.

The UC Davis Well being examine sought to find out whether or not a lady who has taken 200 milligrams of mifepristone – the primary drugs within the medical abortion course of – might be much less prone to expel the being pregnant if she receives high-dose progesterone as in comparison with placebo remedy. The examine enrolled girls planning a surgical abortion who have been keen to delay the process for 2 weeks. Girls have been adopted for as much as two weeks after taking mifepristone to determine if the being pregnant continued to develop. These with persevering with pregnancies had a surgical abortion as scheduled.

“We planned to enroll 40 women, but stopped the study due to safety concerns,” mentioned Mitchell Creinin, main writer, professor of obstetrics and gynecology and director of Household Planning at UC Davis Well being.

After enrolling 12 girls, three contributors skilled extreme bleeding, requiring ambulance transport to an emergency division. One of the ladies had obtained progesterone and two had obtained placebo. As a result of of these issues of safety, Creinin and his co-investigators stopped the examine early.

For the reason that examine was minimize quick, researchers couldn’t quantify the total extent of the hemorrhage danger. Nonetheless, the examine gives vital perception into the security of utilizing progesterone and never utilizing each medicine throughout medical abortion.

“Women who use mifepristone for a medical abortion should be advised that not following up with misoprostol could result in severe hemorrhage, even with progesterone treatment,” Creinin mentioned.

General, 4 of the six girls within the progesterone group and two of the six girls within the placebo group had a unbroken being pregnant at two weeks and had surgical abortions as deliberate. The authors say these numbers are too small to make conclusions about evaluating the outcomes, which could possibly be attributed to random likelihood.

Coverage implications of the examine

Some states within the U.S. require physicians who present medical abortion to tell girls that if they modify their thoughts after taking mifepristone, a remedy (progesterone) is accessible to make sure the being pregnant will proceed. There isn’t a scientific consensus that helps this declare.

“For now, the level of evidence is still inadequate to support or refute the benefits and risks of progesterone treatment to stop a medical abortion after taking mifepristone,” Creinin mentioned. “Laws should not mandate counseling or provision of any treatment that claims to reverse abortion when both its efficacy and safety are unclear.”

The researchers suggest that progesterone remedy to reverse the mifepristone capsule is human experimentation and may solely be provided in Institutional Evaluation Board-approved medical trials to make sure correct design, reporting and oversight.


Different researchers on this examine embody Melody Hou, Laura Dalton, Rachel Steward and Melissa Chen.



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