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Predictive Factors of Ovarian Response in Ovulation Induction With Intrauterine Insemination of a Gonal-f Low-dose Regimen

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ClinicalTrials.gov Identifier: NCT01100346
Recruitment Status : Terminated
First Posted : April 8, 2010
Last Update Posted : March 18, 2014
Merck Ltd., Taiwan
Information provided by (Responsible Party):
Merck KGaA

March 10, 2010
April 8, 2010
March 18, 2014
January 2010
September 2010   (Final data collection date for primary outcome measure)
  • Number of follicles 11-15 mm and ≥ 16 mm in diameter, estradiol (E2) levels and endometrial thickness [ Time Frame: On the day of hCG administration (during 24-48 hrs after the last Gonal-f injection) ]
  • Total dose of Gonal-f used during stimulation, threshold of Gonal-f dose (daily dose of Gonal-f when follicular growth is > 11 mm in diameter)and duration of Gonal-f treatment [ Time Frame: During the period of ovarian stimulation ]
  • Outcomes of the treatment (Pregnancy status) [ Time Frame: Stimulation start to pregnancy assessment ]
    Clinical pregnancy, multiple pregnancy, miscarriage, cycle cancellation, Ovarian hyperstimulation syndrome (OHSS) and severity.
Same as current
Complete list of historical versions of study NCT01100346 on ClinicalTrials.gov Archive Site
Proportion of subjects with monofollicular development [ Time Frame: On the day of hCG administration (during 24-48 hrs after the last Gonal-f injection) ]
Same as current
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Predictive Factors of Ovarian Response in Ovulation Induction With Intrauterine Insemination of a Gonal-f Low-dose Regimen
A Prospective, Single Center, Observational Study on the Predictive Factors of Ovarian Response in Ovulation Induction (OI) With Intrauterine Insemination (IUI) of a Gonal-f Low-dose Step-up Regimen
This is a single center, prospective, observational study on the use of Gonal-f in controlled ovarian hyperstimulation (COH) in subjects undergoing ovulation induction/ intrauterine insemination (OI/IUI) therapy across Taiwan. It has been observed in the previous studies that COH with follicle stimulating hormone (FSH) is considered as one of the positive predictors of an ongoing pregnancy. Many studies in the past have tried to predict the FSH threshold, defined as the FSH dose on the day when a follicle is >10 mm in diameter, but no studies have been conducted to date to determine the predictive factors for a monofollicular development after COH in IUI cycles. Monofollicular growth contributes significantly to the reduction of multiple pregnancies and thus minimize the risks associated with such pregnancies. This study would provide preliminary data on the factors associated with a monofollicular development in Gonal-f treated cycles using a low dose step-up regimen.

Ovarian stimulation improves the cycle fecundity rate in part by increasing the number of follicles available for fertilisation and correcting subtle, unpredictable ovulatory dysfunction. Intrauterine insemination is an established treatment for subfertility due to cervical factors, male factors, or unexplained etiology. Ovulation induction aims at the selection of a single follicle that would be able to reach the pre-ovulatory size and rupture. The ovarian sensitivity to FSH (FSH threshold) has to be identified to avoid multiple follicular development and hence, the lowest effective dose of FSH should be used in treating infertility.

Treatment in subjects is individualised and is monitored by serum estradiol (E2) measurements and ultrasound scans of the ovaries to assess the endometrial thickness. It has been observed in earlier studies that in OI for unexplained non-conception, induction of more than one follicle did not improve the ongoing pregnancy rate but increased the risk of multiple pregnancies. Therefore, to reduce the number of multiple pregnancies, in all IUI cycles for unexplained non-conception, monofollicular growth was suggested.

The 'low-dose step-up' protocol is the most suitable method to establish an appropriate FSH threshold, which involves a starting FSH dose of 75 IU/day given for 7 to 14 days. Subsequent dose increments of 37.5 IU/day at weekly intervals is determined based on the ovarian response, usually when a follicle of diameter ≥10 mm is not seen in the ovaries. Human chorionic gonadotrophin (hCG) is then injected when the leading follicle is ≥18 mm in diameter.


Primary objective:

  • To describe the outcome of treatment in a cohort of subjects undergoing OI/IUI therapy using Gonal-f

Secondary objective:

  • To explore the predictive factors of ovarian response in OI/IUI therapy using a low-dose step-up regimen

This study is planned to enrol 30 female subjects from 1 centre in Taiwan. Each subject can receive up to 3 treatment cycles. Before undergoing a controlled ovarian stimulation with Gonal-f, a thorough gynaecologic and endocrinologic evaluation of the subject will be performed and the subjects will be given the first administration of Gonal-f low dose step up regimen for the controlled ovarian stimulation at the baseline visit. The objective of the Gonal-f therapy is to develop a single mature graafian follicle from which the ovum will be liberated after the administration of hCG. If a subject fails to respond adequately after 4 weeks of treatment, the cycle will be abandoned and the subject would recommence the treatment at a higher starting dose than in the abandoned cycle. If an excessive response is obtained, treatment would be stopped and hCG administration will be withheld and in the next cycle the treatment would start at a dosage lower than that of the previous cycle. Each enrolled subject will be followed up until the confirmation of her pregnancy status.

Observational Model: Cohort
Time Perspective: Prospective
Not Provided
Retention:   Samples Without DNA
Non-Probability Sample
Female subjects with regular menstrual cycles aged between 20 and 35 years in Taiwan.
Drug: Gonal-f (Follitropin alpha)
A starting dose of 75 IU/day subcutaneously is maintained for a period of 7 to 14 days. The follitropin alpha dose would be subsequently increased by 37.5 IU/day at weekly intervals based on the ovarian response.
Other Name: Gonal-f
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*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
September 2010
September 2010   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Female subjects aged between 20 and 35 years
  • Subjects with regular menstrual cycle of 25 - 35 days
  • Subjects with both ovaries
  • Subjects with normal uterine cavity as investigated by either ultrasound scan or hysteroscopy and patent fallopian tube
  • Subjects with baseline serum FSH level within normal range of the clinic
  • Subjects whose male partner's semen is considered adequate for IUI in accordance to the centre's standard practice

Exclusion Criteria:

  • Subjects with any contraindication to being pregnant and/or carrying a pregnancy to term
  • Subjects with extrauterine pregnancy or abortion in the past 3 months
  • Subjects with abnormal gynaecological bleeding of undetermined origin
  • Subjects with history of OHSS
  • Subjects with known hypersensitivity to recombinant FSH preparations or any of their recipients
Sexes Eligible for Study: Female
20 Years to 35 Years   (Adult)
Contact information is only displayed when the study is recruiting subjects
EMR 700623-509
Not Provided
Not Provided
Merck KGaA
Merck KGaA
Merck Ltd., Taiwan
Study Director: Medical Responsible Merck Ltd., Taiwan
Merck KGaA
November 2012