CClinicalTrials.gg
TerminatedNCT04998591KiWuCUpdated Dec 14, 2022

Effects of Fasting on Success Rates of Assisted Reproductive Techologies

An interventional study of Fasting in Sub Fertility, Female, Fertility Disorders and Fertility Issues, sponsored by Charite University, Berlin, Germany. Terminated at 1 site in Germany. Open to female participants aged 25 Years to 38 Years. Per ClinicalTrials.gov, last updated 2022-12-14.

Sponsored by Charite University, Berlin, Germany · Not applicable, Interventional, and Treatment

Why this study was terminated
Recruitment difficulties
Phase
Not applicable
Study type
Interventional
Enrollment
1
Allocation
Randomized
Ages
25 Years to 38 Years
Sex
Female
01

Study summary

This exploratory study investigates fasting as a potential supportive therapy for infertility treatment in women undergoing in-vitro-fertilization (IVF) / intracystoplamsatic sperm injection (ICSI)

Read the detailed description

This 2-arm, randomized, controlled exploratory clinical trial aims to explore fasting as a novel supportive treatment in female infertility during IVF / ICSI. The participants will be randomized in two groups: a fasting group and a waiting list. The intervention group follows a fasting intervention, whereas the patients on the waiting list continue their normal diet. All groups will be trained and accompanied by medical experts. In addition, qualitative interviews will be conducted including individual and focus group interviews with a subgroup of participants.

02

Conditions studied

  • Sub Fertility, Female
  • Fertility Disorders
  • Fertility Issues
  • Sub-fertility
  • IVF

Keywords

  • fasting
  • natural therapies
  • caloric restriction
  • lifestyle modification
  • dietary restriction
  • dietary intervention
  • complementary medicine
  • integrative medicine
  • Intracytoplasmatic sperm injection ICSI
03

In context

Infertility

2,506 studies on the registry are indexed under Infertility; 407 are open to participants now.

This study's enrollment of 1 is below the median of 120 across 1,698 interventional studies indexed under Infertility.

Browse Infertility studies →

Lead sponsor

Charite University, Berlin, Germany is the lead sponsor of 836 studies on the registry; 129 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
25 Years to 38 Years
Sexes eligible
Female
Accepts healthy volunteers
No

Inclusion criteria

  • Women aged 25 to 38 years with planned IVF / ICSI
  • 1 ng/ml ≤ Anti-Mullerian Hormone (AMH) ≤ 4 ng/ml
  • Unfulfilled desire to have children >1 year
  • 25 kg/m² ≤ BMI ≤ 35 kg/m² declaration of consent

Exclusion criteria

Exclusion Criteria:

  • Language barriers
  • Previously known serious mental illness or cognitive impairment
  • Patients with anatomical/organic damage and proven uterine abnormalities
  • Eating disorders in the medical history
  • Serious previous internal diseases
  • Lack of internet access
  • No consent to randomisation
  • Participation in other studies
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
1 participant (actual)

Study arms

  • Experimental
    Fasting group

    Participants will be councelled and accompanied to follow a fasting regime of 7 days in an outpatient setting under medical supervision.

    Behavioral: Fasting

  • No intervention
    Waiting list

    This group maintains their individual diet during the whole time of the study. In case that the first cycle of In-Vitro-Fertilization fails, they are offered a fasting intervention before a next cycle.

Interventions

  • BehavioralFasting

    fasting for 7 days (caloric intake \<500 kcal in liquid form)

    Also known as: Prolonged Fasting

06

What researchers measure

Primary outcomes

  1. Fertilisation rate

    Fertilisation rate of the retrieved oocytes

    Time frame: throughout 1-3 days after in-vitro-fertilization (IVF) / intracytoplasmatic sperm injection (ICSI)

Secondary outcomes

  1. glucose in culture medium of oocytes

    chemical composition of culture medium (glucose)

    Time frame: throughout 1-3 days after in vitro fertilisation

  2. lactate in culture medium of oocytes

    chemical composition of culture medium (lactate)

    Time frame: throughout 1-3 days after in vitro fertilisation

  3. pyruvate in culture medium of oocytes

    chemical composition of culture medium (pyruvate)

    Time frame: throughout 1-3 days after in vitro fertilisation

  4. pregnancy rate

    pregnancies after IVF/ICSI

    Time frame: 4 weeks after IVF/ICSI

  5. rate of mature oocytes

    rate of mature oocytes

    Time frame: at IVF / ICSI intervention

  6. rate of life births

    rate of life births after IVF/ICSI

    Time frame: 10 months after IVF/ICSI

  7. rate of implantable embryos

    rate of implantable embryos after the IVF/ICSI

    Time frame: at IVF/ICSI

  8. Course of IVF/ICSI preparation and pregnancy

    Course of IVF/ICSI preparation and pregnancy

    Time frame: 4 weeks and 10 months after IVF / ICSI

  9. WHO-5 questionnaire

    Quality of life

    Time frame: baseline, within one week before IVF, 4 weeks after IVF, 10 months after baseline

  10. changes in diet

    self-developed questionnaire to examine dietary behaviour

    Time frame: baseline, within one week before IVF, 4 weeks after IVF, 10 months after baseline

  11. mindfulness

    MAAS-questionnaire, validated questionnaire to examine mindfulness

    Time frame: baseline, within one week before IVF, 4 weeks after IVF, 10 months after baseline

  12. anxiety and depression

    HADS-questionnaire, validated questionnaire to examine anxiety and depression

    Time frame: baseline, within one week before IVF, 4 weeks after IVF, 10 months after baseline

  13. current mood

    ASTS-questionnaire, validated questionnaire to examine current mood

    Time frame: baseline, within one week before IVF, 4 weeks after IVF, 10 months after baseline

  14. experienced stress

    Cohen-stress scale, validated questionnaire to examine experienced stress

    Time frame: baseline, within one week before IVF, 4 weeks after IVF, 10 months after baseline

  15. physical fitness

    questionnaire to examine physical fitness

    Time frame: baseline, within one week before IVF, 4 weeks after IVF, 10 months after baseline

  16. quality of relationship

    self-developed questionnaire to examine the relationship between the two partners desiring to have a child

    Time frame: baseline, within one week before IVF, 4 weeks after IVF, 10 months after baseline

  17. psychological stress caused by the unfulfilled desire to have children

    self-developed questionnaire to examine the psychological stress caused by the unfulfilled desire to have children

    Time frame: baseline, within one week before IVF, 4 weeks after IVF, 10 months after baseline

  18. gratitude

    validated questionnaire to examine gratitude

    Time frame: baseline, within one week before IVF, 4 weeks after IVF, 10 months after baseline

  19. self-efficacy

    ASKU, validated questionnaire to examine self-efficacy

    Time frame: baseline, within one week before IVF, 4 weeks after IVF, 10 months after baseline

  20. abdominal sonography

    sonography in a subgroup

    Time frame: within 1 month before, during and within 2 weeks after the fasting intervention

07

Study locations

1 site
  • Hochschulambulanz für Naturheilkunde der Charité-Universitätsmedizin Berlin
    Berlin, 14109, Germany
08

References and documents

Individual participant data

Plan to share: Yes — Data will be made available upon request.

Supporting information: Study protocol, Sap, Icf, Analytic code

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 14, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04998591
Lead sponsor
Charite University, Berlin, Germany
Collaborators
Karl and Veronica Carstens Foundation
Responsible party
Andreas Michalsen (Prof. Dr. med., Charite University, Berlin, Germany) — Principal investigator
First posted
Aug 10, 2021
Start date
Aug 3, 2021
Primary completion
Dec 12, 2022
Completion
Dec 12, 2022
Last update
Dec 14, 2022

Study contacts

Andreas Michalsen, Prof. Dr.
principal investigator · Charite University, Berlin, Germany

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is terminated, as verified in Dec 2022. You cannot join it, but the record below documents what was studied.

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