Who is sponsoring NCT03620838?

NCT03620838 is sponsored by Uludag University.

What drugs are being tested in NCT03620838?

Interventions in NCT03620838: oral contraceptive pill, oral progesterone.

What condition does NCT03620838 study?

NCT03620838 studies Ovarian Reserve, Endometrioma.

Is NCT03620838 still recruiting?

NCT03620838 is currently status unknown. Last updated 10 October 2019.

Last reviewed 2019-10-10 · How we verify

NCT03620838: ERROR2

Name: Drug Landscape Pharmaceutical Database
Creator: Drug Landscape
Published: 2026-01-01
License: https://creativecommons.org/licenses/by/4.0/

Endometrioma Per se Versus Treatment Related Reduction in Ovarian Reserve (ERROR-2 Trial)

Status unknown Last updated 10 October 2019

What this trial tests

trial testing oral contraceptive pill, oral progesterone in Ovarian Reserve in 250 participants. Status unknown.

Timeline

1 March 2019

Primary endpoint
1 September 2020

1 September 2020

Quick facts

Lead sponsor	Uludag University
Status	Status unknown
Study type	OBSERVATIONAL
Enrollment	250
Start date	1 March 2019
Primary completion	1 September 2020
Estimated completion	1 September 2020
Sites	1 location across Turkey (Türkiye)

Drugs / interventions tested

oral contraceptive pill, oral progesterone — full drug profile →

Conditions studied

Ovarian Reserve — all drugs for Ovarian Reserve →
Endometrioma — all drugs for Endometrioma →

Sponsor

Uludag University

Who can join

Adults 18 to 40, female only, with Ovarian Reserve or Endometrioma. Patients with the condition only — healthy volunteers not accepted.

Sponsor's own description

The present multi-center study aimed to evaluate whether endometrioma-associated decline in ovarian reserve is progressive in the absence of an intervention and is greater in magnitude than the natural decline over time. Also the affect of endometrioma treatment modalities like surgery or medical on the ovarian reserve over time.

Publications & conference data

2 peer-reviewed publications reference this trial (live from Europe PMC):

ERROR-2 Study (Endometrioma Related Reduced Ovarian Reserve): The impact of endometrioma per se and its treatment modalities on ovarian reserve: Prospective cohort study
Aslan K, Kasapoglu I, Kosan B, Muzii L, et al · · 2025 · DOI 10.22541/au.174219896.60883322/v1
Impact of endometrioma management strategies on ovarian reserve over the follow-up period, a prospective longitudinal study.
Aslan K, Kasapoglu I, Kosan B, Gurbuz TB, et al · · 2025 · PMID 41019321 · DOI 10.3389/fendo.2025.1631108

Verify or expand the search:

Other recruiting trials for Ovarian Reserve

Currently open trials in the same condition.

NCT07469007 — Impact of Surgery for Deep Posterior Endometriosis on Ovarian Reserve (ENDORO) · NA · recruiting
NCT06626282 — Fertility and Ovarian Reserve in Female Childhood Cancer Survivors · recruiting
NCT06633120 — In Vitro Maturation of Human Eggs · NA · recruiting
NCT04487925 — Controlled Ovarian Stimulation Versus Modified Natural Cycles in Poor Responders · Phase 4 · recruiting

Other Uludag University trials

Trials by the same sponsor.

NCT07478601 — Effect of Erector Spinae Plane Block on Postoperative Respiratory Function After Laparoscopic Cholecystectomy · NA · not yet recruiting
NCT07440615 — Lower-Limb Muscle Mass and Cardiovascular and Muscular Performance in Males and Females · NA · not yet recruiting
NCT07393620 — Predictive Value of aEEG and Cerebral Oxygenation on Neurological Outcomes in Newborns With Mild Hypoxic-Ischemic Enceph · not yet recruiting
NCT07350018 — Calfactant vs Poractant Alfa Using a Less Invasive Technique in Preterm Infants With Respiratory Distress Syndrome · Phase 4 · not yet recruiting
NCT07365605 — Lower-Limb Muscle Mass and Balance Performance · not yet recruiting

Verify against primary sources

ClinicalTrials.gov — authoritative US registry record
WHO ICTRP — international registry index
EU Clinical Trials Register
Sponsor press releases (Google)

Data sources for this page

Trial protocol + status: ClinicalTrials.gov NCT03620838 (US National Library of Medicine, public domain)
Publications: Europe PMC API search by NCT ID, retrieved 9 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Uludag University
Last refreshed: 10 October 2019

Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT03620838.

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing