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[Insertion problems, removal problems, and contraception failures with Implanon].

L Bensouda-Grimaldi1, A-P Jonville-Béra, F Beau-Salinas

  • 1Service de pharmacologie, hôpital Bretonneau, université François-Rabelais, Centre régional de pharmacovigilance et d'information sur le médicament, Tours, France.

Gynecologie, Obstetrique & Fertilite
|December 3, 2005
PubMed
Summary
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Pregnancy can occur with Implanon (etonogestrel implant) due to insertion errors or improper use. Strict physician training is crucial to minimize risks like device migration and ensure correct contraceptive implant placement.

Area of Science:

  • Pharmacovigilance
  • Reproductive Health
  • Contraception

Context:

  • A national pharmacovigilance study analyzed Implanon (etonogestrel implant) use in France.
  • Data collected from May 2001 to September 2002.
  • Focused on contraception failures, device migration, and insertion/removal complications.

Purpose:

  • To evaluate the safety and efficacy of Implanon based on reported adverse events.
  • To determine the incidence of pregnancies and device-related issues.
  • To identify factors contributing to Implanon failures.

Summary:

  • 39 unintended pregnancies reported, primarily due to insertion errors (77%) or untimely insertion (10%).
  • Contraceptive failure due to etonogestrel's reduced efficacy occurred in 7.6% of pregnancies, often linked to drug interactions.

Related Experiment Videos

  • 28 cases of suspected device migration, removal problems, and insertion difficulties were reported.

    • Impact:

    • Highlights the critical need for proper Implanon insertion technique and adherence to prescribing guidelines.
    • Emphasizes the importance of comprehensive physician training to prevent complications.
    • Findings contribute to understanding real-world contraceptive implant performance and patient safety.