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[Levonorgestrel releasing subcutaneous implants. 1st year's experience].
R Aznar Ramos1, R Lara Ricalde, M Lozano Baldera
1Instituto Nacional de Perinatología, México, D.F.
Ginecologia Y Obstetricia De Mexico
|April 1, 1991
Summary
Levonorgestrel implants are highly effective contraceptives for Mexican women, with no pregnancies observed in over two years of use. Common side effects include menstrual changes and site soreness, but overall continuation rates are high.
Area of Science:
- Reproductive Health
- Contraception
- Pharmacology
Background:
- Subdermal implants are a reversible contraceptive method.
- Levonorgestrel is a progestin hormone used in various contraceptives.
- Evaluating long-term efficacy and safety is crucial for family planning.
Purpose of the Study:
- To assess the contraceptive efficacy of levonorgestrel-releasing subdermal implants.
- To identify and quantify the side effects associated with these implants.
- To determine the one-year continuation rate in Mexican women.
Main Methods:
- Multicentric study involving 246 Mexican women.
- Follow-up at four medical centers of the Mexican Institute of Social Security (IMSS).
- Data collected over 2326 months of observation.
Main Results:
- Zero pregnancies observed, indicating high contraceptive efficacy.
- Most frequent side effects: menstrual disorders (34.8%), headache (13.4%), nausea/dizziness/vomiting (11.6%).
- Implant discontinuation due to menstrual alterations (7.3%) and site soreness (3.5%).
Conclusions:
- Levonorgestrel implants demonstrate high contraceptive efficacy.
- Menstrual irregularities and site soreness are primary reasons for discontinuation.
- A one-year continuation rate of 84.3% suggests implants are a viable family planning option.