Rescue Progesterone Supplementation During Frozen Embryo Transfer

NCT ID: NCT05555121

Last Updated: 2025-12-09

Basic Information

• Recruitment Status: SUSPENDED
• Clinical Phase: PHASE2
• Total Enrollment: 150 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-12-01
• Study Completion Date: 2028-06-30

Brief Summary

Endometrin is a progesterone supplement prescribed during in vitro fertilization (IVF) for preparation for embryo transfer. The usual dose of Endometrin is 100 mg two to three times per day in the form of an effervescent tablet to be inserted vaginally.

The purpose of this research project is to evaluate the dose response of the Endometrin when determined based on the blood level of progesterone on the day of the FET. According to the literature, a predefined level of progesterone in the blood should be reached in order to have favorable conditions for pregnancy. The hypothesis being that a woman with low progesterone levels would benefit from a dose of Endometrin of 600 mg (200 mg 3x/day) to decrease the risk of miscarriage and improve the chances of pregnancy. Women with adequate progesterone levels according to the literature, would continue with the standard dose of progesterone prescribed at clinique ovo which is 300 mg (100 mg 3x/day).

PIBF (Progesterone Induced Blocking Factor) levels, a protein found in the blood that could also predict pregnancy outcomes in women using IVF will also be looked at.

Conditions

Fertility Issues; Embryo Implantation; Frozen Embryo Transfer

Study Design

• Allocation Method: NON_RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Endometrin 100 mg three times per day (TID)

Women with progesterone levels ≥ 8.8 ng/ml during frozen embryo transfer cycle will take Endometrin 100 mg TID until 10th week of pregnancy

Group Type: ACTIVE_COMPARATOR

Progesterone Effervescent Vaginal Tablet

Intervention Type: DRUG

On the day of Frozen Embryo Transfer (FET), women will have a blood test to determine progesterone levels. Depending on the result of progesterone level, the participant will be assigned to either the Endometrin 100 mg TID dose or the Endometrin 200 mg TID dose

Endometrin 200 mg three times per day (TID)

Women with progesterone levels \< 8.8 ng/ml during frozen embryo transfer cycle will take Endometrin 200 mg TID until 10th week of pregnancy

Group Type: ACTIVE_COMPARATOR

Progesterone Effervescent Vaginal Tablet

Intervention Type: DRUG

On the day of Frozen Embryo Transfer (FET), women will have a blood test to determine progesterone levels. Depending on the result of progesterone level, the participant will be assigned to either the Endometrin 100 mg TID dose or the Endometrin 200 mg TID dose

Interventions

Progesterone Effervescent Vaginal Tablet

On the day of Frozen Embryo Transfer (FET), women will have a blood test to determine progesterone levels. Depending on the result of progesterone level, the participant will be assigned to either the Endometrin 100 mg TID dose or the Endometrin 200 mg TID dose

Intervention Type: DRUG

Other Intervention Names

Endometrin

Eligibility Criteria

Inclusion Criteria

• Women 18-42 years of age
• Normal uterine cavity (according to treating physician)
• FET substituted cycle prescribed
• First or second cycle of FET
• Adequate endometrial pattern (triple layer) and thickness (>7 mm) after adequate standard endometrial preparation in artificial cycle

Exclusion Criteria

• Any uterine abnormalities confirmed by treating physician making participant unable to proceed with FET
• Patients with personalized FET according to the endometrial receptivity assay tests
• Previous allergic reactions to progesterone or any of the ingredients of Endometrin
• Severe hepatic dysfunction or disease
• Known or suspected breast cancer or genital tract cancer
• Known active arterial or venous thromboembolism or severe thrombophlebitis or cerebro-vascular disease, or a history of these events
• Diagnosed porphyria
• Undiagnosed abnormal vaginal bleeding
• Known missed abortion or ectopic pregnancy
• Recurrent pregnancy loss excluding biochemical pregnancies
• Hypersensitivity to Acetylsalicylic acid (ASA), salicylates, non-steroidal anti-inflammatory drugs (NSAIDs), analgesics, antipyretics or other ingredients in the product or component of the container
• Acute gastrointestinal ulcer, history of gastrointestinal ulcers and hemorrhagic diathesis
• Active or severe renal disease, or congestive heart failure
• History of asthma induced by salicylates or other NSAIDs
• Use of methotrexate at doses of 15mg/week or more
• Glucose-6-phosphate dehydrogenase (G6PD) deficiency

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 42 Years
• Eligible Sex: FEMALE
• Accepts Healthy Volunteers: No

Sponsors

Clinique Ovo

INDUSTRY

Sponsor Role: lead

Ferring Pharmaceuticals

INDUSTRY

Sponsor Role: collaborator

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Wael Jamal, MD

Role: PRINCIPAL_INVESTIGATOR

Clinique Ovo

Locations

Clinique Ovo

Montreal, Quebec, Canada

Countries

Canada

Other Identifiers

IIS-1032

Identifier Type: -

Identifier Source: org_study_id