A Novel Stimulation Protocol and the Conventional Low Dose Step-up and Step Down Regimens

2014-08-27 03:14:07 | BioPortfolio


This study is designed to compare the efficacy of a novel stimulation protocol with the conventional low dose step-up and step down regimens in older than 30 years PCOS patients undergoing in vitro fertilisation. The novel regime was proposed under the basis of the combined effectiveness of the two standard protocols to induce a uniform follicular growth and forms a continuation to the author's previously published results examining a similar approach in younger PCOS candidates. In total 225 patients have been recruited for this study. The stimulation protocol will be assigned under the basis of prospective randomization using sealed and numbered envelopes. All patients will be down regulated using a desensitisation agent administered on day 2 of spontaneous or induced withdrawal bleeding. The initial dosage in the low dose step-up regimen (group A) will be 150 IU/d of FSH for the first 6 days followed by an increase of 75 IU thereafter. In the step-down regimen (group B) patients will administer a starting dose of 300 IU/d of FSH for the first 3 days followed by a decrease to 225 IU/d for the next 3 days. This dosage will be further decreased to 150 IU/d or sustained at 225 IU (according to the initial response) until the day of the hCG injection. Group C, patients received 225 IU on day 1 followed by a decrease to 150 IU on day 2. On day 3 the dosage will be increased back to 225 IU. This alternation of injection dosage will be followed until day 6. According to the initial ovarian response the dosage will be sustained at 225 IU/d or 150 IU/d until the day of the hCG injection. The 10,000 IU hCG will be administered when at least two follicles had reached a mean diameter of 18 mm and the serum E2 levels were consistent with the ultrasound findings. Egg retrieval will be undertaken at 35 hours after the administration of the hCG injection. Oocytes recovered will be inseminated 4 hours post egg collection. Patients will receive 3 embryos on the third day of development. The luteal phase will be supported by progesterone suppositories starting on the day of the egg collection. A positive outcome will be detected by a serum β-hCG analysis 13 days after embryo replacement. The presence of a fetal heart pulse on ultrasound 3 weeks later confirmed a clinical pregnancy.

Study Design

Observational Model: Cohort, Time Perspective: Prospective




mode of gonadotropin administration


Genesis Centre for Fertility and Human Pre-implantation Genetics


Enrolling by invitation


Genesis Center for Fertility & Human Pre-Implantation Genetics

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:14:07-0400

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Medical and Biotech [MESH] Definitions

Non-therapeutic positive end-expiratory pressure occurring frequently in patients with severe airway obstruction. It can appear with or without the administration of external positive end-expiratory pressure (POSITIVE-PRESSURE RESPIRATION). It presents an important load on the inspiratory muscles which are operating at a mechanical disadvantage due to hyperinflation. Auto-PEEP may cause profound hypotension that should be treated by intravascular volume expansion, increasing the time for expiration, and/or changing from assist mode to intermittent mandatory ventilation mode. (From Harrison's Principles of Internal Medicine, 12th ed, p1127)

Administration of a drug or chemical by the individual under the direction of a physician. It includes administration clinically or experimentally, by human or animal.

A gonadotropic glycoprotein hormone produced primarily by the PLACENTA. Similar to the pituitary LUTEINIZING HORMONE in structure and function, chorionic gonadotropin is involved in maintaining the CORPUS LUTEUM during pregnancy. CG consists of two noncovalently linked subunits, alpha and beta. Within a species, the alpha subunit is virtually identical to the alpha subunits of the three pituitary glycoprotein hormones (TSH, LH, and FSH), but the beta subunit is unique and confers its biological specificity (CHORIONIC GONADOTROPIN, BETA SUBUNIT, HUMAN).

The application of drug preparations to the surfaces of the body, especially the skin (ADMINISTRATION, CUTANEOUS) or mucous membranes. This method of treatment is used to avoid systemic side effects when high doses are required at a localized area or as an alternative systemic administration route, to avoid hepatic processing for example.

The administration of drugs through the nasal passage.

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