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Long-term experience with Norplant contraceptive implants in Finland
Contraception
|March 1, 1985
Summary
Levonorgestrel implants offer effective long-term contraception with no pregnancies in five years. While menstrual irregularities caused early discontinuation, many women desiring pregnancy conceived quickly after implant removal.
Area of Science:
- Reproductive Medicine
- Contraception
- Endocrinology
Background:
- Long-acting reversible contraceptives (LARCs) are crucial for family planning.
- Subdermal implants offer a discreet and effective LARC option.
Purpose of the Study:
- To evaluate the efficacy and continuation rates of levonorgestrel implants for long-term contraception.
- To assess reasons for discontinuation and return to fertility after removal.
Main Methods:
- A prospective study involving 124 women using levonorgestrel-releasing Silastic implants.
- Follow-up conducted over five years to record pregnancy, continuation, and reasons for removal.
Main Results:
- Zero accidental pregnancies occurred during five years of use.
- Five-year continuation rates were 54% overall and 68% medically relevant.
- Menstrual irregularities were the primary reason for early discontinuation, mainly within the first two years.
Conclusions:
- Levonorgestrel implants demonstrate high efficacy and safety for long-term contraception.
- Fertility returns rapidly after implant removal, with a high conception rate.
- Managing menstrual side effects may improve long-term continuation rates.