Official Title: “Post Operative Continuous Active Combination Sex Steroids for the Prevention of Recurrent Endometrioma Formation”

The aim of this study is to determine whether or not continuous combined oral contraceptive pills (COCP's) decrease the risk of recurrent endometrioma formation. The investigators' hypothesis is that patients who have endometriomas surgically removed and then are started on COCP's will have a decreased incidence of recurrent endometrioma formation. The investigators' research protocol is designed to show a statistically significant decreased incidence of endometrioma formation in the hopes that physicians will use COCP's in patients they have removed an endometrioma in who do not desire immediate fertility. Long term, the investigators hope to establish a standard of care that COCP's be used postoperatively in appropriate candidates to decrease the chance of recurrent endometrioma formation.

Study Type: Interventional

Study Design: Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Prevention

Study Primary Completion Date: October 2011

We plan to identify patients planning to undergo conservative surgery for endometrioma at the University of Oklahoma private practice OB/GYN clinic and at the University of Oklahoma Resident Women's clinic. After clear and appropriate consent and discussion regarding options, we plan to randomize patients to monophasic OCPs vs. placebo following surgery. We plan to enroll 35 patients in each arm and follow them for 24 months following the surgery.

Surveillance with pelvic exam and transvaginal ultrasonography will occur at 2, 6 and 12 months. The patients surgery will be done prior to enrolling in our study. We will use information from their surgery only to confirm the diagnosis of endometrioma. The only procedure the subjects will undergo during the protocol are periodic transvaginal ultrasonography.

Intervention(s) in this Clinical Trial

• Drug: Norethindrone acetate and ethinyl estradiol tablets, USP
  • Loestrin® 24 Fe provides a dosage regimen consisting of 24 white progestogen-estrogen contraceptive tablets and 4 brown ferrous fumarate (placebo) tablets. Each white tablet contains 1 mg norethindrone acetate and 20 mcg ethinyl estradiol. Each white tablet also contains the following inactive ingredients: acacia, lactose, magnesium stearate, starch, confectioner's sugar, and talc.
• Drug: ferrous fumarate (placebo) tablets
  • Loestrin® 24 Fe provides a dosage regimen consisting of 24 white progestogen-estrogen contraceptive tablets and 4 brown ferrous fumarate (placebo) tablets. Each brown tablet contains ferrous fumarate, microcrystalline cellulose, magnesium stearate, povidone, sodium starch glycolate, and compressible sugar. The ferrous fumarate tablets do not serve any therapeutic purpose.

Arms, Groups and Cohorts in this Clinical Trial

• Experimental: Monophasic OCP
  • Patients randomized to this study arm will receive combined oral contraceptive pills. Patients will follow up at 2, 6, 12, 18 and 24 months. On follow up visits pts will have clinical assessment with vaginal and rectal examinations and with transvaginal ultrasonography. As a measure of compliance, patients will return their empty pill packages
• Placebo Comparator: Placebo
  • Patients assigned to this arm will use non-hormonal, barrier contraceptives to prevent pregnancy.Patients will follow up at 2, 6, 12, 18 and 24 months. On follow up visits pts will have clinical assessment with vaginal and rectal examinations and with transvaginal ultrasonography. As a measure of compliance, patients will return their empty pill packages.

Primary Measures

• To determine whether or not continuous combined oral contraceptive pills decrease the risk of recurrent endometrioma formation.
  • Time Frame: October 2011
    Safety Issue?: No

Secondary Measures

• Long term, we hope to establish a standard of care that COCPs be used postoperatively in appropriate candidates to decrease the chance of recurrent endometrioma formation.
  • Time Frame: October 2011
    Safety Issue?: No

Inclusion Criteria:

• Patients with a diagnosis of ovarian endometriotic cyst that has been surgically excited.

Exclusion Criteria:

• Current desire to achieve pregnancy or other contraindication to combined oral contraceptive pills.

Gender Eligibility for this Clinical Trial: Female

Minimum Age for this Clinical Trial: 18 Years

Maximum Age for this Clinical Trial: 35 Years

Are Healthy Volunteers Accepted for this Clinical Trial?: Accepts Healthy Volunteers

Lead Sponsor: University of Oklahoma

Overall Clinical Trial Officials and Contacts

Katie M Smith, M.D. Principal Investigator University of Oklahoma  

Information obtained from ClinicalTrials.gov on September 01, 2010

Link to the current ClinicalTrials.gov record. http://clinicaltrials.gov/show/NCT00999479

Study ID Number: Endometrioma

ClinicalTrials.gov Identifier: NCT00999479

Health Authority: United States: Food and Drug Administration