Clinical Study: Emergency Contraception

You may be eligible to participate in a research study and receive emergency contraception at no cost

Female open hand holding a white pill

You may be eligible if you:

  • Are 18-40 years old
  • Have had unprotected sex within the last 72 hours and are seeking emergency contraception
  • Weigh more than 176 lbs.
  • Are not currently using hormonal birth control
  • Have regular menstrual cycles

PI: Alison Edelman, M.D., M.P.H.

IRB# 18441

If you are eligible to receive EC you will be seen within 24 hours of calling

  • Women's Health Research Unit Emergency Contraception Line: 971-373-1828
  • Clinic hours:
    • M-F: 8 a.m. - 4 p.m.
    • Weekends: 9 - 11 a.m.

What does participation include?

At the clinic visit, participants will be screened for eligibility. If eligible, participants will have blood drawn and receive a dose of emergency contraception [Ella (30 mg UPA), Plan B (1.5 mg LNG), or 2x Plan B (3.0 LNG)].

Participants will have 2-3 follow-up phone calls at 5, 12 and 19 days after expected date of next menstrual period and they will be asked the results of at home pregnancy tests and whether they've had a period since taking emergency contraception.

If participants have not had a period by 19 days after taking study drug, they will return to the clinic for pregnancy evaluation.


Qualified participants will also be compensated up to $200 for time and travel.

Why is this study being done?

Women weighing over 176 lbs. are more likely than women of lower weight to experience a failure of the emergency contraceptive containing levonorgestrel (LNG). Previous studies have suggested that doubling the dose of LNG emergency contraception could improve its effectiveness for women of higher weight. We are doing this study to see which dose and type of EC works best at preventing pregnancy in women weighing more than 176 lbs.