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Taking peoplePhase 3

Low dose hCG before IVF in women with diminished ovarian reserve

Tests hCG against placebo before IVF in women with diminished ovarian reserve.

Key facts

Who runs it
Kristine Loessl
Where
Denmark1 site in 1 countryChoose a country to see its sites
Registry title
hCG Priming in Women With Diminished Ovarian Reserve
Status
Recruiting
Phase
Phase 3
People taking part
80 people, planned
Started
25 Jan 2026
Expected to end
31 Mar 2031
Type of study
Interventional, 2 groupsOne group gets a placebo (a dummy treatment), for comparison.
Treatments tested
  • Choriongonadotropin alfa (hCG)
  • Isotonic NaCl (Placebo)
Record updated
21 September 2026

Who can take part

AI summary

From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.

The trial is looking for women with a low egg reserve (diminished ovarian reserve) who are having IVF/ICSI. They get 8 weeks of low dose hCG or placebo before a second ICSI treatment.

Age
18 to 40 years (both included)
Sex
Women only
Disease stage
Diminished ovarian reserve. Regular menstrual cycle of 23-35 days.
Earlier treatment
Must be in the 1st to 5th IVF/ICSI cycle when joining.
Biomarker or test result
AMH < 6.29 pmol/L (Elecsys® AMH assay)

Main reasons for not taking part

  • Malformed womb, blocked fluid-filled tube (hydrosalpinx), fibroids inside the womb lining or womb polyps
  • Endometriosis stage III-IV
  • Planned genetic testing of embryos or sperm taken from the testicle
  • Ovarian enlargement or cysts, or vaginal bleeding of unknown cause
  • Known severe illness, such as diabetes, heart, lung, liver or kidney disease, HIV, Hepatitis B/C, or certain cancers

The registry criteria, word for word

Show all 14 criteriaShow less

Who can take part

  • Age 18-40 (both inclusive)
  • Regular menstrual cycle (23-35 days)
  • 1.-5. IVF/ICSI cycle at inclusion
  • AMH < 6.29 pmol/L (Elecsys® AMH assay)

Who cannot take part

  • Allergy to standard IVF/ICSI medication
  • Known severe comorbidity*; i.e., Insulin dependent diabetes mellitus, non-insulin dependent diabetes mellitus, gastrointestinal, cardiovascular, thromboembolic (including active thromboembolic disorders), pulmonary, liver or kidney diseases, HIV or Hepatitis B/C, dysregulated thyroid disease, tumors of the hypothalamus or pituitary gland or ovarian, uterine, or mammary carcinoma
  • Uterine malformations or hydrosalpinx
  • Submucosal uterine myomas
  • Uterine polyps
  • Endometriosis stage III-IV
  • Preimplantation genetic testing
  • Testicular sperm aspiration/extraction
  • Ovarian enlargement or cysts (other than normally occurring corpora luteae)
  • Gynaecological haemorrhages of unknown aetiology

Check if you might fit

Answer for yourself. This is not a decision: only the study team can say whether you can take part.

  • Are you between 18 and 40 years old?

This trial has no sites in United States.

It has sites in one country. Choose a country to see its sites.

About the trial

What the trial wants to find out

The aim of this randomized controlled trial is to further examine the possible effects of low dose human chorionic gonadotropin (hCG) priming for eight weeks in women with diminished ovarian reserve (DOR) undergoing in vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI). The investigators want to retest the findings of our first study in an identical paired design (NCT04643925), as an increase of 1.5 in mean number of oocytes retrieved is clinically relevant. To incorporate the strengths of a randomized controlled trial design, women will be randomized after their first ICSI treatment to receive either hCG or placebo in a double-blinded design during an eight-week priming period preceding their second ICSI treatment. The primary outcome is the number of oocytes retrieved in the second ICSI treatment.

The 2 groups in the trial

  • hCG PrimingTreatment being tested

    Women in the experimental group will undergo the following treatment in order: A standard IVF/ICSI cycle (ICSI I): A standard IVF/ICSI cycle in the fixed GnRH-antagonist protocol using a daily dose of 300 IU rFSH initiated from cd 2-3 and a GnRH antagonist (Ganirelix 0.25 mg) from stimulation day 5-6 followed by blastocyst culture and a freeze-all strategy. Priming period: hCG priming 260 IU once daily for two menstrual cycles (approximately 8 weeks). A standard IVF/ICSI cycle (ICSI I): A standard IVF/ICSI cycle in the fixed GnRH-antagonist protocol using a daily dose of 300 IU rFSH initiated from cd 2-3 and a GnRH antagonist (Ganirelix 0.25 mg) from stimulation day 5-6 followed by blastocyst culture and a single blastocyst transfer at day 5.

    Treatment: Choriongonadotropin alfa (hCG)

  • PlaceboPlacebo, for comparison

    Women in the placebo group will undergo the following treatment in order: A standard IVF/ICSI cycle (ICSI I): A standard IVF/ICSI cycle in the fixed GnRH-antagonist protocol using a daily dose of 300 IU rFSH initiated from cd 2-3 and a GnRH antagonist (Ganirelix 0.25 mg) from stimulation day 5-6 followed by blastocyst culture and a freeze-all strategy. Priming period: Placebo (isotone NaCl) injections once daily for two menstrual cycles (approximately 8 weeks). A standard IVF/ICSI cycle (ICSI I): A standard IVF/ICSI cycle in the fixed GnRH-antagonist protocol using a daily dose of 300 IU rFSH initiated from cd 2-3 and a GnRH antagonist (Ganirelix 0.25 mg) from stimulation day 5-6 followed by blastocyst culture and a single blastocyst transfer at day 5.

    Treatment: Isotonic NaCl (Placebo)

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

Print a page for my doctor

Data and sources

Registry record
Listed on ClinicalTrials.gov and on the EU's official list of trials (CTIS).
Official title
Eight Weeks of Low Dose hCG Priming in Women With Diminished Ovarian Reserve Undergoing IVF/ICSI - a Randomized Controlled Trial
Plain-language title
Low dose hCG before IVF in women with diminished ovarian reserveGenerated from the registry record. The registry title is the official one.
AI summary
From the trial's eligibility criteria. Read by machine on 15 November 2026.
Fit questions
Built from NCT07108621, who can take part
Record updated
21 September 2026