Condition category
Pregnancy and Childbirth
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status
Results overdue

Plain English Summary

Background and study aims
In some cases of infertility, fertilisation and the early post-fertilisation development occur normally, but the resulting embryos fail to implant in the uterus (womb). This problem can be caused by insufficient production of the hormone called progesterone by the ovary. This abnormality is often associated with hormonal treatment protocols used for in vitro fertilisation (IVF). To solve this problem, women treated by IVF are usually given extra progesterone after the embryo is transferred to the uterus. Recent data have shown that, in addition to progesterone administration, the production of progesterone by the patient’s own ovary can be stimulated by treating the patients with a gonadotropin releasing hormone (GnRH) agonist. The aim of this study is to evaluate the effects of a GnRH agonist on IVF outcomes and blood progesterone levels in a group of women with a previous failure of the technique, associated with low blood progesterone levels.

Who can participate?
Women between 25 and 40 years of age with a previous IVF failure associated with low blood progesterone levels after embryo transfer

What does the study involve?
The study compares outcomes of two consecutive attempts of IVF in the same patients. Unlike the first attempt, in the second attempt the patients are treated with a GnRH agonist during 2 weeks after embryo transfer to the uterus. Except for this difference, the patients receive the same treatment in both attempts. Clinical pregnancy rate (number of pregnancies divided by the number of embryo transfer procedures) is measured from medical records at 3 months after embryo transfer.

What are the possible benefits and risks of participating?
Patients may have better IVF outcomes in the second attempt, without any additional side effects.

Where is the study run from?
MARGen Clinic (Spain)

When is the study starting and how long is it expected to run for?
September 2016 to April 2018

Who is funding the study?
MARGen Clinic (Spain)

Who is the main contact?
1. Dr Raquel Mendoza-Tesarik
2. Dr Jan Tesarik

Trial website

Contact information



Primary contact

Dr Jan Tesarik


Contact details

MARGen Clinic
Camino de Ronda 2
+346 (0)637 6992

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

Efficient treatment of luteal phase deficiency in HCG-triggered IVF cycles by prolonged administration of GnRH agonist after embryo transfer


Study hypothesis

This study aimed to identify women with IVF failure associated with low serum progesterone levels on the days following embryo transfer and to evaluate the effects of GnRH agonist on serum progesterone and pregnancy in GnRH antagonist-controlled and HCG-triggered IVF cycles.

Ethics approval

Not applicable

Study design

Observational case-control study

Primary study design


Secondary study design

Case-control study

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details to request a patient information sheet


Luteal phase insufficiency in assisted reproduction


In women who failed to get pregnant and had an abnormally low serum progesterone concentration after uterine transfer of embryos resulting from in vitro fertilisation, the protocol of the subsequent attempt was modified as follows. First, the treatment phase before embryo transfer, including ovarian stimulation, ovarian follicle puncture and oocyte recovery, in vitro fertilisation, and embryo in vitro culture and uterine transfer, were performed exactly as in the previous attempt. The only difference concerned the period after embryo transfer. In addition to direct progesterone administration, the patients were given daily subcutaneous injections of GnRH agonist (0.1 mg triptorelin) during 14 days following embryo transfer.

Intervention type



Not Applicable

Drug names


Primary outcome measure

Clinical pregnancy rate (number of pregnancies divided by the number of embryo transfer procedures) is measured from medical records 3 months after embryo transfer

Secondary outcome measures

1. Implantation rate (number of gestational sacs containing a living embryo implanted in the uterus divided by the number of embryos transferred) is measured from medical records 6 weeks after embryo transfer
2. Serum progesterone concentration is measured using immunoassay at the 7th and 14th day after embryo transfer
3. Total dose of progesterone administered is measured from medical records at the 14th day after embryo transfer

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Women
2. Aged between 28 and 39 years,
3. Failed to become pregnant
4. Had low luteal-phase progesterone levels in a previous in vitro fertilization attempt

Participant type


Age group




Target number of participants


Participant exclusion criteria

1. Age of >40 years
2. Andrological gynecological and systemic pathologies unrelated to the corpus luteum function:
2.1. Azoospermia
2.2. Necrozoospermia
2.3. Uterine polyps and fibroids
2.4. Polycystic ovary syndrome
2.5. Endometriosis
2.6. Cushing syndrome
2.7. Diabetes
2.8. Hypothyreosis and hyperthyreosis
2.9. Body mass index >29

Recruitment start date


Recruitment end date



Countries of recruitment


Trial participating centre

MARGen Clinic
Camino de Ronda 2

Sponsor information


MARGen Clinic

Sponsor details

Camino de Ronda 2
+34 (0)6063 76992

Sponsor type

Hospital/treatment centre



Funder type

Hospital/treatment centre

Funder name

MARGen Clinic

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Study results will be submitted to a specialized scientific journal during 2018.

IPD sharing statement
The data sharing plans for the current study are unknown and will be made available at a later date.

Intention to publish date


Participant level data

To be made available at a later date

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes