An Observational Study to Compare the Dose of Gonal-fTM FbM Prescribed by the Doctor With the Recommendation of the Dose Calculator Consort and to Evaluate the Ease of Use of Pre-filled Pen of Gonal-fTM FbM Pen

2014-08-27 03:15:28 | BioPortfolio


This is a prospective, observational and multicentric study to compare the Gonal-f FbM (filled by mass) dose prescribed by the doctor with the Gonal-f FbM dose determined by the CONSORT (Consistency in r-FSH Starting doses for individualized treatment) calculator.


The ovarian stimulation with the follicle-stimulating hormone (FSH) is the main element for the success of medically assisted procreation (MAP) technique. The possibility of predicting a poor ovarian response would thus enable the doctor to proactively define the treatment cycle and subject expectations. However, it is difficult to select the right dose of recombinant-human FSH (r-hFSH) to reach the "acceptable" number of oocytes. A series of reports, in which investigators identified different variables associated with ovarian response, appeared in the literature so as to develop a more structured approach with the aim of determining the initial Gonal-f dose in an MAP cycle.

After having reviewed the literature, following predictive factors present a strong correlation with the ovarian response:

- Initial serum FSH during the premature follicle phase (day 2-4 of the cycle),

- Body mass index (BMI; in kg/m2),

- Age,

- Initial number of antral follicles (day 2-4 of the cycle) determined in the ultrasound scan.

The relative importance of each of these factors was judged on the basis of a statistical model analysis and an r-hFSH dose (Gonal-f in international units [IU]) was attributed to each factor with a view of creating guidelines and determining the optimal FSH dose (using CONSORT dose calculator) to be used on the basis of the initial predictive characteristics/variables specific to the subject.

The purpose of this study is to compare the Gonal-f FbM dose prescribed by the doctor with the Gonal-f FbM dose determined by the CONSORT calculator.

A short questionnaire will be used to evaluate the ease of using the pre-filled Gonal-f (FbM) pen. The dosage and administration of Gonal-f shall be in accordance with the Product Features Summary (PFS) and current clinical practice in the centers.


Primary objective:

- To study whether the Gonal-f FbM dose prescribed by the doctor is different from the dose recommended by the CONSORT dose calculator

Secondary objectives:

- To evaluate the ease of using the new generation Gonal-f pen for subjects

- To compare the Gonal-f dose finally used with the dose used during the previous treatment cycles (if this data is available)

- To put a figure to the total duration of the treatment, total quantity of gonadotropins taken and the number of clinical pregnancies

- In case of use of the CONSORT calculator: to estimate cancellations due to poor response This observational study will be conducted in 8 fertility centers in Belgium and Luxembourg as per the current clinical practice conditions in force at each center. Each center will recruit approximately 30 subjects to reach a total of approximately 250 subjects. The maximum number of treatment cycles to be evaluated in this project will be 600 over a period of approximately 6 months.

The CONSORT dose calculator is made available to all the participating centers via a secure web site. Each investigator will receive a user identification and password to access the system. The investigator will then introduce the 4 individual variables of the subject (basal FSH, BMI, age and number of antral follicles [follicles ≥2mm - <11mm]) in the CONSORT calculator, which will determine an individualized dose of Gonal-f for this specific subject. If the investigator does not agree with the dose calculated by CONSORT and opts for another dosage, he/she may indicate it directly in the CRF (Case Report Form). In this case, the Gonal-f dose will be based on the investigator's advice in accordance with the clinical practice in force in the center.

Follicle development shall be monitored in accordance with the current clinical practice of the center with diagnostic ultrasound and/or estradiol (E2) dosage until the local criteria for the administration of the human chorionic gonadotropin (hCG) is reached. Human chorionic gonadotropin will be administered in accordance with the current clinical practice of the center to reach final oocyte maturation. The date of administration of the hCG (Ovitrelle) will be indicated in the CRF.

Study Design

Observational Model: Cohort, Time Perspective: Prospective


Multifollicular Stimulation


Recombinant-follicle stimulating hormone (r-FSH)


ZNA Middelheim
Lindendreef 1


Active, not recruiting


Merck KGaA

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:15:28-0400

Clinical Trials [1848 Associated Clinical Trials listed on BioPortfolio]

Immunogenicity of Repeated Follicle Stimulating Hormone (FSH) Stimulation Cycles

The purpose of the study is to evaluate immunogenic potential of FSH-IBSA in healthy volunteers undergoing controlled ovarian hyperstimulation (COH) in an oocyte donation program.

Individual Versus Standard Follicle Stimulating Hormone Dose for Controlled Ovarian Stimulation and Insemination

The purpose of this study is to test if recombinant follicle stimulating hormone (rFSH) given in individual doses, according to a nomogram we have constructed based on our results from a p...

Ovarian Response to Recombinant Follicle Stimulating Hormone in Women With PCOS

Women with PCOS suffer from anovulation and, as a result, infertility. Efforts to clinically induce ovulation in these women using follicle stimulating hormone (FSH) administered subcutane...

Triggering of Follicular Maturation

The follicular phase of the menstrual cycle involves the hourly release of gonadotropin-releasing hormone, which binds to receptors on the gonadotropes. This results in the secretion of fo...

Optimisation of Follicular Recruitment in IVM Cycles

The study will focus on important aspects related to follicle recruitment using exogenous gonadotropins in patients with polycystic ovaries: 1. Early follicle recruitment in patients wi...

PubMed Articles [4709 Associated PubMed Articles listed on BioPortfolio]

Follicle dynamics: visualization and analysis of follicle growth and maturation using murine ovarian tissue culture.

To visualize and analyze follicle development in ovarian tissue culture using physiological concentrations of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in order to establish an o...

The role of FSH and TGF-β superfamily in follicle atresia.

Most of the mammalian follicles undergo a degenerative process called "follicle atresia". Apoptosis of granulosa cells is the main characteristic of follicle atresia. Follicle stimulating hormone (FSH...

Diurnal rhythm of follicle-stimulating hormone is associated with nonalcoholic fatty liver disease in a Chinese elderly population.

Previous studies have found that impairment of the circadian clock appears to contribute to the development of nonalcoholic fatty liver disease (NAFLD) and the circulating follicle-stimulating hormone...

Re: Clomiphene citrate and letrozole to reduce follicle-stimulating hormone consumption during ovarian stimulation: systematic review and meta-analysis. T. N. Bechtejew, M. N. Nadai, C. O. Nastri and W. P. Martins. Ultrasound Obstet Gynecol 2017; 50: 315-323.

Concentrations of follicle stimulating hormone associated with follicle selection, number of follicles, and ipsilateral vs contralateral relationships in mares.

Diameter deviation or follicle selection during a follicular wave begins with continuous growth rate of F1 (dominant or selected follicle; DF) and decreasing growth rate of F2 (largest subordinate). I...

Medical and Biotech [MESH] Definitions

Receptors with a 6-kDa protein on the surfaces of cells that secrete LUTEINIZING HORMONE or FOLLICLE STIMULATING HORMONE, usually in the adenohypophysis. LUTEINIZING HORMONE-RELEASING HORMONE binds to these receptors, is endocytosed with the receptor and, in the cell, triggers the release of LUTEINIZING HORMONE or FOLLICLE STIMULATING HORMONE by the cell. These receptors are also found in rat gonads. INHIBINS prevent the binding of GnRH to its receptors.

A decapeptide that stimulates the synthesis and secretion of both pituitary gonadotropins, LUTEINIZING HORMONE and FOLLICLE STIMULATING HORMONE. GnRH is produced by neurons in the septum PREOPTIC AREA of the HYPOTHALAMUS and released into the pituitary portal blood, leading to stimulation of GONADOTROPHS in the ANTERIOR PITUITARY GLAND.

The beta subunit of follicle stimulating hormone. It is a 15-kDa glycopolypeptide. Full biological activity of FSH requires the non-covalently bound heterodimers of an alpha and a beta subunit. Mutation of the FSHB gene causes delayed puberty, or infertility.

A major gonadotropin secreted by the adenohypophysis (PITUITARY GLAND, ANTERIOR). Follicle-stimulating hormone stimulates GAMETOGENESIS and the supporting cells such as the ovarian GRANULOSA CELLS, the testicular SERTOLI CELLS, and LEYDIG CELLS. FSH consists of two noncovalently linked subunits, alpha and beta. Within a species, the alpha subunit is common in the three pituitary glycoprotein hormones (TSH, LH, and FSH), but the beta subunit is unique and confers its biological specificity.

A potent synthetic long-acting agonist of GONADOTROPIN-RELEASING HORMONE that regulates the synthesis and release of pituitary gonadotropins, LUTEINIZING HORMONE and FOLLICLE STIMULATING HORMONE.

More From BioPortfolio on "An Observational Study to Compare the Dose of Gonal-fTM FbM Prescribed by the Doctor With the Recommendation of the Dose Calculator Consort and to Evaluate the Ease of Use of Pre-filled Pen of Gonal-fTM FbM Pen"

Quick Search


Relevant Topics

Endocrine Disorders
Endocrine disorders are grouped into two categories: hormone imbalance - when a gland produces too much or too little of an endocrine hormone development of lesions (such as nodules or tumors) in the endocrine system, which may or may not affect...

Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...

Searches Linking to this Trial