This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Feasibility Study Into the Contraceptive Effect of Estetrol

This study has been completed.
Information provided by (Responsible Party):
Pantarhei Bioscience Identifier:
First received: November 22, 2007
Last updated: May 4, 2012
Last verified: May 2012

This is an open study in 50 young, healthy, female volunteers. Women who want to participate and who are using hormonal contraception stop using their hormonal contraceptive and wait for their first spontaneous menstruation (i.e. after a wash-out cycle). Women who do not use hormonal contraception wait for their next menstruation. From the 9th day after start of the menstruation onwards follicle growth will be monitored by ultrasonography until ovulation occurs or until day 24 after start of their menses. Women who ovulate within 24 days after start of their menses will be eligible to participate and will be stratified in one of 4 groups: 10 mg estetrol (E4) alone, 20 mg E4 alone, 20 mg E4 combined with 150 mcg desogestrel and 20 mg E4 combined with 200 mg progesterone. The subjects will be treated for 28 days. Treatment will start on the first day of their menses after the pre-treatment cycle.

During the study period (28 days) the activity of the hypothalamic-pituitary-ovarian (HPO) axis will be investigated by measuring follicular development using ultrasonography and by determining serum concentrations of Follicle Stimulating Hormone (FSH), Luteinising Hormone (LH), estradiol (E2) and Progesterone (P).

Condition Intervention Phase
Healthy Drug: estetrol Drug: estetrol and desogestrel Drug: estetrol and progesterone Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Feasibility Study Into the Contraceptive Effect of Estetrol Alone or Combined With Either Progesterone or Desogestrel by Daily Oral Administration to Healthy Female Volunteers for 28 Days.

Resource links provided by NLM:

Further study details as provided by Pantarhei Bioscience:

Primary Outcome Measures:
  • ovulation inhibition [ Time Frame: during treatment ]

Secondary Outcome Measures:
  • endocrine parameters [ Time Frame: during treatment ]

Enrollment: 52
Study Start Date: November 2007
Study Completion Date: August 2008
Primary Completion Date: August 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: 1
10 mg estetrol
Drug: estetrol
10 mg orally per day for 28 days
Active Comparator: 2
20 mg estetrol
Drug: estetrol
20 mg orally per day for 28 days
Active Comparator: 3
20 mg estetrol and 150 microg desogestrel
Drug: estetrol and desogestrel
20 mg estetrol and 150 microg desogestrel orally per day for 28 days
Active Comparator: 4
20 mg E4 and 200 mg progesterone
Drug: estetrol and progesterone
20 mg estetrol and 200 mg progesterone orally per day for 28 days


Ages Eligible for Study:   18 Years to 40 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • At least 18 years and not older than 40 years of age
  • Willing to use a barrier method of contraception during the wash-out cycle, the pre-treatment cycle, the period of study drug administration, the period of lynestrenol intake (if applicable), and 14 days thereafter or until the follow-up visit if this 14-days period ends before the follow-up visit.
  • Women who ovulate in the pre-treatment cycle before or on day 24 (±1) after start of their menses, who have a subsequent P concentration of > 16 nmol/l and whose next menstruation does not start within 6 days after ovulation
  • Body Mass Index > 18 and <30 kg/m2
  • Good physical and mental health
  • Both ovaries visible upon ultrasonography
  • Willing to give informed consent in writing

Exclusion Criteria:

  • Clinically significant abnormal results of routine hematology, serum biochemistry, urinanalysis, and/or ECG in the opinion of the Investigator at screening.
  • Known or suspected pregnancy
  • Lactation
  • Pregnancy during accurate hormonal contraceptive use
  • Known or suspected breast cancer or a history of breast cancer
  • Clinically significant abnormalities of the uterus and/or ovaries detected by examination and/or ultrasound (non-physiological ovarian mass or significant uterine pathology).
  • A cervical smear with clinically relevant abnormal cytology within one year before study start.
  • Previous use of depot progestogen preparations in the last 6 months.
  • Contraindications for contraceptive steroids:

    • a history of, or existing thromboembolic, cardiovascular or cerebrovascular disorder
    • a history of, or existing conditions predisposing to, or being prodromi of, a thrombosis
    • a known defect in the blood coagulation system (e.g. deficiencies in AT-III, protein C, S, and APC resistance)
    • heterozygous for a mutation in coagulation factor II and/or positive for factor V Leiden
    • the presence of a severe or more than one risk factor for vascular disease (e.g. dyslipoproteinaemia; diabetes mellitus; hyperhomocysteinaemia; systemic lupus erythematosus; chronic inflammatory bowel disease; antiphospholipid antibodies; smoking; venous thromboembolism in sibling or parent below the age of 50, or arterial disease in sibling or parent below the age of 35; within 2 weeks after full remobilisation following surgery)
    • hypertension, i.e. systolic blood pressure >140 mmHg and/or diastolic blood pressure >90 mmHg
    • disturbance of liver function: e.g. cholestatic jaundice, a history of jaundice of pregnancy or jaundice due to previous oestrogen use, Rotor syndrome and Dubin-Johnson syndrome
    • known or suspected hormone-dependent tumours or endometrial hyperplasia
    • undiagnosed vaginal bleeding
    • porphyria
    • a history during pregnancy or previous hormone-use of severe pruritus, herpes gestationis or deterioration of otosclerosis
  • Use of one or more of the following medications:

    • sex steroids other than the medication of study
    • use at present or within 2 months before start study medication:
    • hydantoins, barbiturates, primidone, carbamazepine, oxcarbazepine, topiramate, troglitazone, felbamate, rifampicin, rifabutin, griseofulvin and St. John's wort (Hypericum perforatum)
  • Status post-partum or post-abortion within a period of 2 months before study start
  • Administration of investigational drugs within 3 months before start study medication
  • A history of (within 12 months) alcohol or drug abuse
  • A known hypersensitivity for one of the components of the study medication (eg arachisoil and lactosis)
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00563472

Groningen, Netherlands, 9713 GZ
Sponsors and Collaborators
Pantarhei Bioscience
Study Director: H. Coelingh Bennink, MD, PhD Pantarhei Bioscience
  More Information

Responsible Party: Pantarhei Bioscience Identifier: NCT00563472     History of Changes
Other Study ID Numbers: PR3081
Study First Received: November 22, 2007
Last Updated: May 4, 2012

Keywords provided by Pantarhei Bioscience:
Healthy female volunteers will participate in this study

Additional relevant MeSH terms:
Contraceptive Agents
Reproductive Control Agents
Physiological Effects of Drugs
Hormones, Hormone Substitutes, and Hormone Antagonists
Contraceptives, Oral, Synthetic
Contraceptives, Oral
Contraceptive Agents, Female processed this record on July 26, 2017