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Related Experiment Videos

Long acting contraceptives. Present status.

G Benagiano, F M Primiero

    Drugs
    |June 1, 1983
    PubMed
    Summary

    Long-acting injectable hormonal contraceptives, despite past controversy, are safe for human use. Scientific reviews confirm no toxicological concerns, making them effective fertility control options.

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    Area of Science:

    • Reproductive Health
    • Pharmacology
    • Toxicology

    Background:

    • Long-acting injectable hormonal contraceptives are highly effective but controversial due to animal carcinogenicity data.
    • Critical analysis reveals animal data mechanisms are not applicable to humans.
    • Major scientific bodies affirm the safety of these contraceptives for human use.

    Purpose of the Study:

    • To critically analyze animal data regarding injectable hormonal contraceptives.
    • To differentiate between monthly and multi-month injectable contraceptives.
    • To review the efficacy, side effects, and safety of available injectable contraceptives.

    Main Methods:

    • Literature review and critical analysis of animal studies.
    • Comparison of progestagen-only injectables (DMPA, NET-EN) and monthly estrogen-progestagen injectables.
    • Evaluation of reported side effects, menstrual pattern disruption, pregnancy rates, and fertility return.

    Main Results:

    • Animal carcinogenicity data does not translate to human risk.
    • Progestagen-only injectables (DMPA, NET-EN) are available; DMPA has longer action but more amenorrhea, NET-EN has shorter action and higher pregnancy rates.
    • Monthly estrogen-progestagen injectables offer better menstrual control but contain long-acting estrogen.

    Conclusions:

    • Long-acting injectable hormonal contraceptives are safe and effective fertility regulators.
    • Menstrual disruption is the primary side effect, varying between formulations.
    • Fertility return is delayed but not impaired after use.

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