How does Mifepristone work? Mifepristone is a medication used in medical abortion that works by blocking the hormone progesterone, which is essential for maintaining pregnancy. Without progesterone, the pregnancy cannot continue, and the body begins the process of ending it.
What Is Mifepristone?
Mifepristone is a prescription medication approved in the United States for early pregnancy termination. It is commonly used along with Misoprostol to safely and effectively end a pregnancy.
How Mifepristone Works in the Body
Mifepristone works by targeting pregnancy hormones in three key ways:
1. Blocks Progesterone
Progesterone is a hormone that helps the uterus support and nourish a pregnancy. Mifepristone binds to progesterone receptors and blocks its action, causing the uterine lining to break down.
2. Stops Pregnancy Growth
Without progesterone, the embryo can no longer stay attached to the uterine wall. This effectively halts the progression of the pregnancy.
3. Softens the Cervix
Mifepristone also helps soften and open the cervix, making it easier for the uterus to expel the pregnancy tissue when the second medication is taken.
What Happens After Taking Mifepristone?
After taking Mifepristone:
- The pregnancy stops developing within 24–48 hours
- The uterine lining begins to shed
- Mild cramping or spotting may start
A second medication, Misoprostol, is usually taken afterward to complete the process by causing uterine contractions.
Is It Effective?
When used correctly with Misoprostol, Mifepristone is highly effective (over 95%) in early pregnancy. Its effectiveness may vary depending on how far along the pregnancy is and whether the correct dosage is followed.
Final Thoughts
How does Mifepristone work? In simple terms, it blocks the hormone needed to sustain pregnancy, leading to its natural termination process. For safety and best results, it should always be used under proper medical guidance and according to approved protocols.