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Inactive
Last updated: January 7, 2026

MENTR Implant

MENT Acetate Implant, 7alpha-Methyl-19-Nortestosterone, MENTR

  • User: Male
  • Hormonal: Hormonal
  • Delivery type:
    • Subdermal
  • Intended Duration:
    • Long-Acting
  • Development Stage: Phase II
  • Developer(s)/researcher(s): Population Council
Details
  • API: 7alpha-Methyl-19-Nortestosterone
  • Target: Androgen Receptor
  • Mechanism of Action:
    • Not Yet Determined
  • Inactive Materials: Elastomer, EVA
  • Regimen: 2-4 Implants (Simultaneous)/12 Months
  • MPT: Not Potential MPT
  • Promising Attributes: MENT is more potent than testosterone and is resistant to 5 alpha-reduction. Long-acting implants improve compliance and efficacy.
Product Status

Developer Confirms Product is Inactive

History

Population Council and the University of Helsinki have evaluated 7 alpha-methyl-19-nortestosterone (MENT) for use in a long-acting contraceptive implant for male users since at least 1993. 2003 clinical trial results indicated that implants containing MENT acetate could inhibit sperm production over a long duration. Population Council has also evaluated MENT in combination with etonogestrel and levonorgestrel. In 2023, Population Council affirmed their continued interest in the development of a MENT implant, among other male methods. 

Publications