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Effect of Oocyte Vitrification on Fertilization Rate, Embryo Quality and Development

This study has been completed.
Merck Sharp & Dohme Corp.
Information provided by (Responsible Party):
Main Line Fertility Center Identifier:
First received: August 22, 2011
Last updated: June 3, 2014
Last verified: June 2014
Indications for oocyte (egg) vitrification (fast freezing) include the preservation of reproductive competence of young cancer patients who need chemotherapy, pelvic radiation, or surgical removal of ovaries for treatment. Furthermore, the ability to freeze oocytes allows patients to reduce the number of embryos frozen, thereby circumventing the moral and ethical dilemmas of having left-over embryos in cryostorage. In addition, oocyte cryopreservation could allow women to delay childbearing if they want or need to. Until recently, conventional cryopreservation protocols have remained too inefficient for practical application in an infertility center. Very little is known about the effects of vitrification on oocytes and subsequent embryo development, especially using the sibling model (group of oocytes from the same cohort of ovarian follicles within patient). The purpose of this study is to examine the effect of oocyte vitrification on fertilization rates, embryo quality and development.

Condition Intervention Phase
Procedure: Freezing
Early Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single Blind (Investigator)
Primary Purpose: Basic Science
Official Title: A Study to Compare Vitrified/Warmed Oocytes vs. Fresh Sibling Oocytes Collected Following Controlled Ovarian Stimulation Using Follistim AQ and Ganirelix Acetate on Fertilization Rates, Zygote Quality, Embryo Quality and Embryo Development

Further study details as provided by Main Line Fertility Center:

Primary Outcome Measures:
  • fertilization rate [ Time Frame: 18 hours after insemination ]
  • Embryo Quality [ Time Frame: day 3 and day 5 ]
  • Embryo Development [ Time Frame: Day 3 and day 5 ]

Enrollment: 40
Study Start Date: August 2011
Study Completion Date: May 2013
Primary Completion Date: May 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: freezing Procedure: Freezing
No Intervention: No freezing


Ages Eligible for Study:   21 Years to 37 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • healthy women ages 21-37 (inclusive)undergoing IVF in an attempt to achieve pregnancy
  • Day 2-4 FSH < 10 IU/ml, LH <12 IU/ml, and E2 <50 pg/ml
  • Antimullerian Hormone (AMH) >1.5
  • Between 5 and 20 basal antral follicles on day 2-4 of the menstrual cycle
  • BMI >18 and <32

Exclusion Criteria:

  • Smokers
  • Polycystic Ovarian Syndrome (PCO)
  Contacts and Locations
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Please refer to this study by its identifier: NCT01422395

United States, Pennsylvania
Main Line Fertility Center
Bryn Mawr, Pennsylvania, United States, 19010
Sponsors and Collaborators
Main Line Fertility Center
Merck Sharp & Dohme Corp.
Principal Investigator: Glassner J Michael, M.D. Main Line Fertility Center
Study Director: Sharon H. Anderson, Ph.D Main Line Fertility Center
  More Information

Responsible Party: Main Line Fertility Center Identifier: NCT01422395     History of Changes
Other Study ID Numbers: MLFC-001
Study First Received: August 22, 2011
Last Updated: June 3, 2014

Keywords provided by Main Line Fertility Center:
Egg Freezing
Oocyte Cryopreservation processed this record on April 26, 2017