How does the Nexplanon implant prevent pregnancy?

## Understanding How Nexplanon Works 🔬 ### What is Nexplanon? Nexplanon is a type of long-acting reversible contraceptive (LARC) that consists of a small, flexible rod inserted under the skin of the upper arm. This matchstick-sized device releases a synthetic form of progesterone called *etonogestrel* into the bloodstream, providing continuous birth control for up to three years. ### Key Features: - **Duration**: Effective for up to 3 years - **Hormone**: Contains etonogestrel (progestin) - **Effectiveness**: Over 99% effective - **Reversibility**: Fertility typically returns quickly after removal ## Primary Prevention Mechanisms ### 1. Ovulation Suppression The primary way Nexplanon prevents pregnancy is by inhibiting ovulation through: * Preventing the surge of luteinizing hormone (LH) * Stopping the release of eggs from the ovaries * Creating a consistent hormonal environment ### 2. Cervical Mucus Changes Nexplanon causes the cervical mucus to become: 1. Thicker 2. More viscous 3. Less penetrable This creates a hostile environment for sperm, making it difficult for them to travel through the cervix. ### 3. Endometrial Effects > The hormonal effects of Nexplanon also cause changes to the endometrium (uterine lining), making implantation less likely even if fertilization were to occur. ## Timeline of Protection ``` Initial Protection: - If inserted within first 5 days of period: Immediate - If inserted at other times: Takes 7 days ``` ## Benefits of Using Nexplanon * Long-term protection * Low maintenance * Discreet * Quick fertility return after removal * Highly effective contraception ## Potential Side Effects Common effects may include: - Changes in menstrual bleeding patterns - Headaches - Weight gain - Mood changes - Acne For a more detailed list of side effects, visit the [Mayo Clinic's page on Nexplanon](https://www.mayoclinic.org/tests-procedures/contraceptive-implant/about/pac-20393619). ## Healthcare Provider Role The implant must be inserted and removed by a trained healthcare provider. The procedure is: * Quick (usually less than 5 minutes) * Done under local anesthetic * Performed in an outpatient setting ## Monitoring and Follow-up While Nexplanon doesn't require regular maintenance, it's important to: * Check the insertion site periodically * Be aware of the expiration date * Schedule removal or replacement after 3 years * Contact your healthcare provider if you experience concerning side effects For more information about contraceptive options, visit the [Planned Parenthood website](https://www.plannedparenthood.org/learn/birth-control/birth-control-implant-nexplanon) or the [FDA's official page](https://www.fda.gov/consumers/womens-health-topics/birth-control) on birth control methods.

How does the Nexplanon implant prevent pregnancy?

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