Fixed Versus Flexible Gonadotropin-releasing Hormone (GnRH) Antagonist Initiation

Fixed Versus Flexible GnRH Antagonist Initiation

Status

Completed

Phases

Phase 4

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT01005784

Enrollment

146

Registered

2009-11-02

Start date

2005-06-30

Completion date

2008-03-31

Last updated

2009-11-02

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

Conditions

Subfertility

Keywords

GnRH antagonists

Brief summary

This is a comparison of pregnancy achievement between two GnRH antagonist protocols which differ in the timing of GnRH antagonist initiation.

Interventions

DRUGCetrorelix (Cetrotide)

flexible antagonist administration according to specified criteria

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

NONE

Eligibility

Sex/Gender

FEMALE

Age

18 Years to 39 Years

Healthy volunteers

Inclusion criteria

* \< 39 years of age * BMI 18.5-29.9 * \<= 3 previous IVF cycles

Exclusion criteria

* PCOS * Endometriosis

Design outcomes

Primary

Measure	Time frame
Luteinizing hormone rise	3-14 days (duration of ovarian stimulation)

Countries

Greece

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026