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Safety of oral micronized progesterone versus norethisterone acetate in continuous combination with oral estrogen as menopausal hormone therapy – a double-blind randomized study- PROBES study (Progesterone Breast Endometrial Safety study)

Safety of oral micronized progesterone versus norethisterone acetate in continuous combination with oral estrogen as menopausal hormone therapy – a double-blind randomized study- PROBES study (Progesterone Breast Endometrial Safety study)

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTR
Registry ID
EUCTR2021-001624-17-SE
Enrollment
520
Registered
2021-06-14
Start date
2021-07-21
Completion date
Unknown
Last updated
2025-01-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Climacteric symptoms

Interventions

Trade Name: Utrogestan Product Name: Micronized progesterone Pharmaceutical Form: Capsule Pharmaceutical form of the placebo: Capsule Route of administration of the placebo: Oral use Trade Name: Acti

Sponsors

Karolinska University Hospital
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: - Healthy and naturally postmenopausal women (more than one year since last menstruation or FSH > 40 IE/L) with climacteric symptoms (sweating, hot flush and sleep problems) that adversely affect quality of life. - Age 45-60 years - BMI > 19 kg/m2 and = 32 kg/m2 - Intact uterus - In case of previous MHT use, washout 8 weeks for oral MHT and 4 weeks for transdermal MHT or local estrogen treatment before screening - Written informed consent Are the trial subjects under 18? no Number of subjects for this age range: F.1.2 Adults (18-64 years) yes F.1.2.1 Number of subjects for this age range 520 F.1.3 Elderly (>=65 years) no F.1.3.1 Number of subjects for this age range

Exclusion criteria

Exclusion criteria: - Previous history of breast cancer or abnormal mammogram at baseline as assessed clinically by a radiology expert - Previous history of endometrial cancer or hyperplasia or abnormal/proliferative endometrial biopsy at baseline - Vaginal bleeding - Any concomitant medical treatment except for well-controlled hypertension, non-insulin treated type 2 diabetes, asthma and hypothyroidism - History or presence of cardiovascular disease including thromboembolic disorder or cerebrovascular disease - History or presence of liver disease, familial hyperlipidemia, epilepsy or classical migraine with aura - History or presence of clinically significant depression or other psychiatric disorder that might in anyway compromise the performance of the trial or undermine its scientific validity - Current use of MHT or local estrogen treatment - Alcohol and/or drug abuse - Clinically significant findings on physical and/or gynecological examination at baseline - Hypersensitivity to any of the study treatments

Design outcomes

Primary

MeasureTime frame
Main Objective: To compare the effects of one-year treatment with mP versus NETA, both in combination with estradiol, on mammographic breast density.;Secondary Objective: To compare the effects of one-year treatment with mP versus NETA, both in combination with estradiol, on the secondary outcomes below: - Breast cell proliferation - Endometrial cell proliferation - Endometrial thickness using ultrasound - Bleeding pattern Gene and protein expression of growth factors and apoptosis markers in breast and endometrial tissue - Depression and anxiety symptoms (PHQ-9, HADS) - Health-related quality of life (PGWB) - Women’s Health Questionnaire (WHQ) - Blood lipid profile, serum hormones, growth and metabolic factors ;Primary end point(s): -Percentage change in mammographic density compared between the groups.;Timepoint(s) of evaluation of this end point: After 12 months of treatment

Secondary

MeasureTime frame
Secondary end point(s): - Incidence of endometrial proliferation (proliferation marker (Ki67) - Endometrial thickness on ultrasound - Bleeding pattern as documented in a bleeding diary - Gene and protein expression of growth factors and apoptosis markers in breast and endometrial tissue - Depression and anxiety symptoms (Patient Health Questionnaire (PHQ-9), Hospital Anxiety and Depression Scale (HADS)) - Health-related quality of life (Psychological General Well-Being Index (PGWB)) - Women’s Health Questionnaire (WHQ) - Blood lipid profile, serum hormones, growth and metabolic factors (follicle-stimulating hormone, luteinizing hormone, estradiol, progesterone, testosterone, sex hormone-binding globulin, IGF–I and its binding proteins). Incidence of endometrial hyperplasia and cancer. ;Timepoint(s) of evaluation of this end point: After 12 months of treatment

Countries

Sweden

Contacts

Public ContactClinical Research Unit

Karolinska University Hospital

kvinnohalsan.kk.karolinska@sll.se46851773782

Outcome results

None listed

Source: EU CTR (via WHO ICTRP) · Data processed: Feb 6, 2026