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Related Experiment Videos

Prolactin injection, a new contraceptive method: experimental study

A Shafik1

  • 1Department of Surgery & Research, Faculty of Medicine, Cairo University, Egypt.

Contraception
|August 1, 1994
PubMed
Summary

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Weekly prolactin injections in dogs temporarily reduced sperm count to azoospermia, preventing pregnancy. Sperm production and fertility fully recovered after drug withdrawal, indicating potential for reversible male contraception.

Area of Science:

  • Reproductive Endocrinology
  • Veterinary Pharmacology
  • Contraceptive Development

Background:

  • Male contraception research is ongoing.
  • Hormonal interventions are a key area of investigation.
  • Prolactin's role in male reproduction requires further elucidation.

Purpose of the Study:

  • To evaluate prolactin (PRL) injection as a potential reversible male contraceptive method.
  • To assess the effects of weekly PRL administration on canine reproductive parameters.
  • To determine the reversibility of PRL-induced effects on fertility.

Main Methods:

  • Canine subjects received weekly intramuscular injections of prolactin (600 µg/kg) for six months.
  • Evaluated parameters included testicular histology, semen analysis, reproductive hormones, and renal function.
Keywords:
Animals, LaboratoryBiologyCase Control StudiesClinical ResearchContraceptionContraception ResearchContraceptive AgentsContraceptive Agents, MaleContraceptive EffectivenessEndocrine SystemFamily PlanningGenital Effects, MaleGenitaliaGenitalia, MaleHormonesPhysiologyPituitary HormonesProlactinResearch MethodologyResearch ReportReversibilitySpermatogenesis Blocking AgentsStudiesUrogenital System

Related Experiment Videos

  • Fertility was assessed through mating trials during and after PRL treatment.

    • Main Results:

    • Prolactin administration led to azoospermia, decreased sperm motility, and increased abnormal sperm forms within three months.
    • Testicular biopsies revealed degeneration of seminiferous tubules.
    • Reproductive hormones, renal function, and electrolytes remained largely unchanged (P > 0.05).
    • No pregnancies occurred during PRL treatment; fertility and sperm parameters normalized within three months post-treatment, with no offspring anomalies.

    Conclusions:

    • Prolactin injection demonstrates significant potential as a reversible male contraceptive agent.
    • The observed effects on spermatogenesis are reversible upon cessation of treatment.
    • Further research is warranted to explore prolactin's therapeutic window and long-term safety for contraceptive applications.