Sign in
Active, not recruitingPhase 3

FRIEND: Fibroids and Unexplained Infertility Treatment With Epigallocatechin Gallate; A Natural CompounD in Green Tea

Key facts

Who runs it
Yale University
Where
Baltimore, Chicago, and New Haven, United StatesSee the 4 sites
Trial code
Status
Active, not recruiting
Phase
Phase 3
People taking part
33 people enrolled
Started
5 Jan 2023
Ended
30 Sept 2026
Type of study
Interventional, 2 groupsOne group gets a placebo (a dummy treatment), for comparison.
Treatments tested
  • Green Tea Extract
  • Placebo
Record updated
20 August 2026

Who can take part

Age
18 years to 40 years
Sex
Women only
Healthy volunteers
Cannot take part

The registry criteria, word for word

Show all 35 criteriaShow less

Who can take part

  • Intramural fibroids and/or subserosal fibroids that meet the criteria for FIGO types 2-6; at least one fibroid with an average diameter of at least 1 cm in three dimensions. Participants with multiple fibroids including FIGO type 0 and type 1 will be allowed only in combination with additional fibroids type 2-6
  • Women ≥18 to ≤40 years of age, with six months or more infertility history, desirous of conceiving, regularly ovulating (defined as 9 or more menses per year), at initiation of participation. Women < 35 years of age must have at least 12 months of infertility history
  • Baseline AMH ≥ 0.7 ng/ml
  • At least one open fallopian tube confirmed by hysterosalpingography (HSG), sonohysterography, or laparoscopy/hysteroscopy in the last three years preceding enrollment into the study. An uncomplicated intrauterine non-IVF pregnancy and uncomplicated delivery and postpartum course resulting in live birth within the last three years will also serve as sufficient evidence of a patent tube and normal uterine cavity as long as the participant did not have, during the pregnancy or subsequently, risk factors for Asherman's syndrome or tubal disease or other disorder leading to an increased suspicion for intrauterine abnormality or tubal occlusion
  • Evidence of ovarian function/reserve as assessed by day 3 (+/-2 days) FSH ≤12 IU/L within one year prior to study initiation
  • In general, good health as assessed by PI, not taking any medications which could interfere with the study
  • Ability to have inseminations following hCG administration
  • If applicable, the study participant will inform their partner of trial participation
  • Male partner with total motile sperm in the ejaculate of at least 5 million sperm/ml, within one year of study initiation
  • Participant agreement to abstain from use of green tea products in any form during course of study participation in trial

Who cannot take part

  • Clinical intrauterine miscarriages prior to initiating participation: participants must wait 3 months. No exclusion for biochemical pregnancies
  • Subjects using Green Tea/EGCG within 2 weeks prior to study enrollment. Matcha (Japanese green tea), maca powder, green tea beverages and all other forms of green tea require a 2-week wash-out
  • Participants on depo-progestins, or hormonal implants (including Implanon). A two-month washout period will be required prior to screening for participants on these agents. Longer washouts may be necessary for certain depot contraceptive forms or implants, especially when the implants are still in place
  • Couples with previous sterilization procedures (e.g., vasectomy, tubal ligation) which have been reversed
  • Participants who have undergone a bariatric surgery procedure in the recent past (< 12 months) and are in a period of acute weight loss or have been advised against pregnancy by their bariatric surgeon
  • Undiagnosed abnormal uterine bleeding
  • History of deep venous thrombosis, pulmonary embolus, or cerebrovascular event
  • Known heart disease (New York Heart Association Class II or higher)
  • History of, or suspected cervical carcinoma, endometrial carcinoma or breast carcinoma
  • History of alcohol abuse (defined as >14 drinks/week) or binge drinking of ≥ 6 drinks at one time)
  • Known Cushing's disease
  • Allergy or contraindication to the treatment medications: EGCG, clomiphene citrate (CC) or hCG
  • Participants with untreated poorly controlled hypertension defined as a systolic blood pressure ≥ 160 mm Hg or a diastolic ≥ 100 mm Hg obtained on two measures obtained at least 60 minutes apart
  • Known polycystic ovarian syndrome as evidenced by anovulation or oligoovulation hirsutism and/or elevated testosterone levels, and ovarian morphology on ultrasound examination
  • Medical conditions that are contraindications to pregnancy
  • Uncontrolled diabetes with HbA1c > 6.5%
  • Known significant anemia (Hemoglobin <8 g/dL)
  • Known Liver disease (defined as AST or ALT>2 times normal, or total bilirubin >2.5 mg/dL)
  • Known Renal disease (defined as BUN >30 mg/dL or serum creatinine > 1.4 mg/dL)
  • Participants with only intracavity uterine fibroid (FIGO Type 0 or Type 1) when not in combination with other types of fibroids (FIGO type 2-6)
  • Currently pregnant
  • Suspicious ovarian mass
  • Known 21-hydroxylase deficiency or other enzyme defects causing congenital adrenal hyperplasia
  • Known or suspected adrenal or ovarian androgen secreting tumors
  • Stage 3 and 4 endometriosis and endometriomas > 3cm (as per PI discretion)

Where in United States

  • Johns Hopkins, Division of Reproductive Science and Women's Health ResearchBaltimore, United States
  • University of Chicago, Department of Obstetrics and GynecologyChicago, United States
  • University of Illinois at Chicago College of MedicineChicago, United States
  • Yale School of Medicine Dept.of Ob/Gyn & Reproductive SciencesNew Haven, United States

About the trial

What the trial wants to find out

The objective of this study is to determine the effect of low caffeine green tea extract containing 45% epigallocatechin gallate (EGCG) on fibroids and subsequent pregnancy and live births in women seeking fertility treatment.

Read full original descriptionShow less

The population will consist of 50 women desirous of conceiving, ages ≥18 to ≤40 years (at time of consent), and known to have class 2-6 fibroids, according to the FIGO staging system.

The 2 groups in the trial

  • Green tea extract containing 45% epigallocatechin gallate (EGCG)Treatment being tested

    Low caffeine green tea extract (1650mg in 6 capsules) taken orally on a daily basis (QD) along with Clomiphene citrate-intrauterine insemination (CC\_IUI) cycle, up to 4 cycles if no pregnancy is achieved, participant will stop green tea if she becomes pregnant

    Treatment: Green Tea Extract

  • PlaceboPlacebo, for comparison

    Placebo (1650mg in 6 capsules) matched (smell, taste, color, texture) capsules taken orally on a daily basis (QD) along with Clomiphene citrate-intrauterine insemination (CC\_IUI) cycle, up to 4 cycles if no pregnancy is achieved, participant will stop placebo if she becomes pregnant

Data and sources

Registry record
Listed on ClinicalTrials.gov.
Official title
Fibroids and Unexplained Infertility Treatment With Epigallocatechin Gallate; A Natural CompounD in Green Tea (FRIEND)
Publications
Record updated
20 August 2026