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Vitrification Versus Slow Freezing of Human Day 3 Embryos

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified January 2008 by University Hospital, Gasthuisberg.
Recruitment status was:  Active, not recruiting
Sponsor:
ClinicalTrials.gov Identifier:
NCT00710723
First Posted: July 4, 2008
Last Update Posted: July 4, 2008
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by:
University Hospital, Gasthuisberg
  Purpose
In assisted reproduction technology (ART), cryopreservation of embryos maximizes the potential of IVF cycles. Currently different cryopreservation methods are used, the conventional slow freezing method and vitrification. There is, therefore an immediate need to assess which cryopreservation technique is preferential in human IVF. In this prospective randomised study conventional slow freezing and vitrification, using the Hemi-straw carrier system, of human day 3 embryos were compared.

Condition Intervention
Cleavage Stage, Ovum Procedure: vitrification

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: Vitrification Versus Slow Freezing of Human Day 3 Embryos

Further study details as provided by University Hospital, Gasthuisberg:

Primary Outcome Measures:
  • Pregnancy rate [ Time Frame: 9 months ]

Secondary Outcome Measures:
  • survival rate after thawing of embryos [ Time Frame: 24 hours ]

Enrollment: 901
Study Start Date: October 2005
Estimated Study Completion Date: December 2008
Arms Assigned Interventions
Experimental: 1
vitrification
Procedure: vitrification
Vitrification using Hemi-straw carrier system.
No Intervention: 2
Slow freezing

  Show Detailed Description

  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 43 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Embryos of sufficient embryo quality: at least 6 cells on day 3 and less than 20 % fragmentation.
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00710723


Locations
Belgium
UZ Leuven
Leuven, Belgium, 3000
Sponsors and Collaborators
University Hospital, Gasthuisberg
Investigators
Principal Investigator: D'Hooghe Thomas, Prof. Dr. UZ Leuven
  More Information

Responsible Party: Prof. Dr. Thomas D'Hooghe, University Hospital, Gasthuisberg.
ClinicalTrials.gov Identifier: NCT00710723     History of Changes
Other Study ID Numbers: dwille1
First Submitted: January 4, 2008
First Posted: July 4, 2008
Last Update Posted: July 4, 2008
Last Verified: January 2008