Assessment of Multiple Intrauterine Gestations From Ovarian Stimulation

2014-08-27 03:16:48 | BioPortfolio


The objective of this application is to identify a pharmacologic agent which helps couples in whom the female partner ovulates regularly successfully obtain their goal of delivering a healthy child, whose use will result in low rates of multiple gestations. The central hypothesis is that, in infertile ovulatory women undergoing ovarian stimulation (OS) and intrauterine insemination (IUI), the use of aromatase inhibitors (AI) will stimulate the ovaries sufficiently to produce no reduction in the rate of pregnancy, while significantly reducing the numbers of multiple gestational pregnancies that result from stimulation with clomiphene citrate (CC) or follicle stimulating hormone (FSH). The rationale for the proposed research is that reduction of multiple pregnancy rates could significantly reduce maternal and neonatal morbidity and mortality, as well as the cost of healthcare for these individuals and society.


Patient Population

The population will consist of 900 women up to and including women ≥18 to ≤40 years years of age (at time of randomization) desirous of conceiving who will be recruited over approximately a two year period from the Reproductive Medicine Network (RMN) clinical sites and possibly from the Specialized Cooperative Center Programs in Reproductive Research (SCCPIR) sites, through public notification programs.

Study Design

This will be a multi-center, prospective, partially blinded clinical trial of gonadotropins vs. clomiphene citrate vs. aromatase inhibitors. The randomization scheme will be coordinated through the data coordination center (DCC) and the randomization will be stratified by each participating site and within each site for ages 18-34 and 35-40.


Patients will be randomized to receive either FSH, CC, or an AI according to randomization tables generated by a computer randomization program. Treatment assignments will be blocked by site and age group. Subjects randomized to pill treatment will receive medication in double blinded fashion, receiving one type of pill (overcoated CC or AI). Subjects randomized to injectable medication(FSH) will receive vials of medication.

Primary efficacy parameter

Multiple gestation rate following recruitment of multiple follicular development with an AI, as compared to CC and FSH.

Secondary efficacy parameters

Rate of pregnancy obtained, live birth rate, and time to pregnancy following administration of an aromatase inhibitor, as compared to CC and FSH as well as the live birth rate of multiple gestation pregnancies.

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator), Primary Purpose: Treatment




Letrozole (aromatase inhibitor), Clomiphene Citrate, Follicle Stimulating Hormone (gonadotropin)


University of Colorado
United States


Not yet recruiting


Yale University

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:16:48-0400

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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.

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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.

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.

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

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