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Last updated: May 7, 2026

Ulipristal Acetate-Releasing Copper IUD

  • User: Female
  • Hormonal: Hormonal
  • Delivery type:
    • Intrauterine
  • Intended Duration:
    • Not Yet Determined
  • Development Stage: Phase I
  • Developer(s)/researcher(s): Population Council
Details
  • API: Copper, Ulipristal Acetate
  • Mechanism of Action:
    • Inhibition of Sperm Motility
    • Inhibition of Sperm Capacitation
  • Regimen: Not Yet Determined - Tested at 12 Week Release of UA
  • MPT: Not Potential MPT
  • Promising Attributes: Ulipristal Acetate has the potential to significantly reduce unfavorable uterine bleeding and endometrial changes associated with use of copper IUDs without inhibiting efficacy or duration
Product Status

Active/Recent Clinical Research

History

2021: Population Council, in collaboration with Profamilia and with support from NICHD and HRA Pharma, publishes results of a single blinded, randomized 3-group parallel proof of concept study evaluating PK and PD of a copper IUD coated in ulipristal acetate, a drug commonly used for emergency contraception. Study finds that a 20 microgram per day dose produces favorable bleeding patterns without a notable increase in PAECs. The novel product is found to be well-tolerated and acceptable to users.

Publications

Additional Information