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RecruitingNCT06834594BOOSTUpdated Aug 25, 2026

Bleeding Patterns in Sequential and Continuous Progesterone Supplementation in Adolescents With Turner Syndrome

A Phase 4 interventional study of Micronized progesterone 200 MG and Micronized Progesterone 100 MG in Turner Syndrome and Primary Ovarian Insufficiency (Poi), sponsored by Children's Mercy Hospital Kansas City. Recruiting at 1 site in United States. Open to female participants aged 12 Years to 20 Years. Per ClinicalTrials.gov, last updated 2026-08-25.

Sponsored by Children's Mercy Hospital Kansas City · Phase 4, Interventional, and Treatment

Phase
Phase 4
Study type
Interventional
Enrollment
40
Allocation
Non-randomized
Ages
12 Years to 20 Years
Sex
Female
01

Study summary

This is a single-site open label non-randomized study comparing effects of sequential versus continuous use of progesterone supplementation amongst Turner Syndrome (TS) patients with primary ovarian insufficiency (POI) prescribed hormone replacement therapy (HRT).

02

Conditions studied

  • Turner Syndrome
  • Primary Ovarian Insufficiency (Poi)

Keywords

  • Turner syndrome
  • Primary ovarian insufficiency
  • Hormone replacement therapy
03

Who can participate

Ages eligible
12 Years to 20 Years
Sexes eligible
Female
Accepts healthy volunteers
No

Inclusion criteria

  • Diagnosis of Turner Syndrome and Primary Ovarian Insufficiency.
  • Prescribed adult dosing* of transdermal or oral estradiol for estrogen replacement therapy.

    *Adult dosing of will be defined per published clinical practice guidelines from the 2023 International Turner Syndrome Meeting (i.e. 50-200μg/day of transdermal estradiol, or (i.e. 50-200μg/day of transdermal estradiol or 2-4mg/day oral estradiol).

  • Have achieved menarche.

Exclusion criteria

Exclusion Criteria:

  • Disclosure of sexual activity and desire for contraception.
  • Having a levonorgestrel-releasing intrauterine device or etonogestrel arm implant in place.
  • Having received depot medroxyprogesterone within one year prior to study recruitment.
  • Non-English or non-Spanish speaking.
04

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
40 participants (estimated)

Study arms

  • Active comparator
    Sequential progesterone supplementation

    Oral micronized progesterone 200mg for the first 12 days of a 30 to 31-day cycle.

    Drug: Micronized progesterone 200 MG

  • Active comparator
    Continuous progesterone supplementation:

    Oral micronized progesterone 100mg daily taken throughout the 30 to 31-day cycle.

    Drug: Micronized Progesterone 100 MG

Interventions

  • DrugMicronized progesterone 200 MG

    Oral micronized progesterone 200mg for the first 12 days of a 30 to 31-day cycle

    Also known as: Sequential

  • DrugMicronized Progesterone 100 MG

    Oral micronized progesterone 100mg daily taken throughout the 30 to 31-day cycle.

    Also known as: Continuous

05

What researchers measure

Primary outcomes

  1. Menstrual bleeding patterns as assessed by the Pictorial Bleeding Assessment Chart (PBAC)

    PBAC is one of the most common scoring systems used in the literature to quantify menstrual blood loss (MBL) using a pictorial scoring system, with a higher score representing a larger MBL and a score \>100 qualifying as heavy menstrual bleeding

    Time frame: From enrollment to end of treatment at day 90.

Secondary outcomes

  1. Menstrual distress questionnaire (MEDI-Q)

    The Menstrual distress questionnaire (MEDI-Q) is a valid and reliable instrument for the assessment of menstrual distress and its impact on psychological well-being. This tool can be utilized in research and clinical settings to comprehensively investigate the impact of menstruation on various populations

    Time frame: From enrollment to end of treatment at day 90.

  2. Endometrial thickness.

    Endometrial thickness measured by transabdominal pelvic ultrasound.

    Time frame: On study day 90 +/- 14 days.

06

Study locations

1 of 1 sites recruiting
  • Children's Mercy Hospital
    Kansas City, Missouri 64108, United States
    • Allie Ranallo · Contact · alranallo@cmh.edu · +1-816-394-2574
    • Andrea Manlove · Contact · almanlove@cmh.edu · +1-816-731-7326
    • Tazim Dowlut-McElroy, M.D., M.S. · Principal investigator
    • Madeline Ross, M.D. · Sub investigator
    • Joseph Cernich, M.D. · Sub investigator
    Recruiting
07

References and documents

Publications

  • Gravholt CH, Andersen NH, Christin-Maitre S, Davis SM, Duijnhouwer A, Gawlik A, Maciel-Guerra AT, Gutmark-Little I, Fleischer K, Hong D, Klein KO, Prakash SK, Shankar RK, Sandberg DE, Sas TCJ, Skakkebaek A, Stochholm K, van der Velden JA; International Turner Syndrome Consensus Group; Backeljauw PF. Clinical practice guidelines for the care of girls and women with Turner syndrome. Eur J Endocrinol. 2024 Jun 5;190(6):G53-G151. doi: 10.1093/ejendo/lvae050. PubMed 38748847 ↗
  • Panay N, Anderson RA, Bennie A, Cedars M, Davies M, Ee C, Gravholt CH, Kalantaridou S, Kallen A, Kim KQ, Misrahi M, Mousa A, Nappi RE, Rocca WA, Ruan X, Teede H, Vermeulen N, Vogt E, Vincent AJ; ESHRE, ASRM, CREWHIRL, and IMS Guideline Group on POI. Evidence-based guideline: premature ovarian insufficiency. Hum Reprod Open. 2024 Dec 9;2024(4):hoae065. doi: 10.1093/hropen/hoae065. eCollection 2024. PubMed 39660328 ↗
  • Dowlut-McElroy T, Kanakatti Shankar R. Hormone Replacement Therapy after Pubertal Induction in Adolescents and Young Adults with Turner Syndrome: A Survey Study. Horm Res Paediatr. 2024;97(1):62-69. doi: 10.1159/000530724. Epub 2023 Apr 24. PubMed 37094554 ↗
  • Dowlut-McElroy T, Shankar RK. The Care of Adolescents and Young Adults with Turner Syndrome: A Pediatric and Adolescent Gynecology Perspective. J Pediatr Adolesc Gynecol. 2022 Aug;35(4):429-434. doi: 10.1016/j.jpag.2022.02.002. Epub 2022 Mar 8. PubMed 35272055 ↗

Individual participant data

Plan to share: No — Protect confidentiality of individuals with this rare disease (Turner syndrome).

08

Registry details

Key details

Study ID
NCT06834594
Lead sponsor
Children's Mercy Hospital Kansas City
Responsible party
Tazim Dowlut-McElroy (Director, Division of Gynecology, Children's Mercy Hospital Kansas City) — Principal investigator
First posted
Feb 19, 2025
Start date
Jul 31, 2025
Primary completion
Jul 30, 2028 (estimated)
Completion
Jul 31, 2028 (estimated)
Last update
Aug 25, 2026

Study contacts

Allie Ranallo
Contact
alranallo@cmh.edu
+1-816-394-7534
Andrea Manlove
Contact
almanlove@cmh.edu
+1-816-731-7326
Tazim Dowlut-McElroy, M.D., M.S.
principal investigator · Children's Mercy Kansas City

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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