Clinical Trial: Polar Body Biopsy for Preimplantation Genetic Screening

Study Status: Completed
Recruit Status: Completed
Study Type: Interventional

Official Title: Polar Body Biopsy (PB) for Preimplantation Genetic Screening

Brief Summary:

People with infertility undergoing in vitro fertilization (IVF) can test the embryos using a method called preimplantation genetic screening (PGS) before they are implanted in the uterus to possibly increase their chances of having a successful pregnancy. One or more cells are removed from the embryo. The chromosomes inside the cells are then tested to identify normal or aneuploid embryo(s).

The investigators propose to evaluate a test called micro array analysis on the chromosomes of the first polar body. This method tests part of the egg that would normally be lost and may help us choose the embryo most likely to become a healthy baby.


Detailed Summary:

The polar body (PB) technique makes use of the 23 chromosomes contained in the first polar body, a part of the egg that is extruded at ovulation. Normally the first polar body disintegrates. However, it can be salvaged by polar body biopsy prior to this so that the chromosomes within can be analyzed. PB has three distinct advantages over conventional Fluorescent in-situ Hybridization (FISH) analysis. First, the polar body biopsy is performed on the day that the oocyte is retrieved (day 0) rather than day 3 so results are available earlier. Secondly, this methodology does not remove cells from the growing embryo. The polar body biopsy removes genetic material that would otherwise degrade. Finally, microarray analysis evaluates all 23 chromosomes while only 9-10 chromosomes can be studied with FISH analysis.

The investigators propose to perform microarray analysis in 50 IVF/ICSI (intracytoplasmic sperm injection) patients undergoing PGS.

Day 0 ICSI; PB* Day 1 Day 2 Day 3 Embryo biopsy with FISH or Microarray analysis Day 4 Day 5 Embryo transfer or embryo biopsy with Microarray analysis followed by Embryo Cryopreservation

Polar body biopsies will be frozen and later analyzed, The PB results will remain undisclosed until the end of the study period. PB results will not be used to guide treatment or clinical management. Embryos will be chosen or deselected for transfer solely based on the standard of care treatment aneuploidy screening analysis.

The three specific aims of the project are as follows:

  • To determine the efficacy of PB biopsy and analysis by comparing the PB results to the Fluorescent in-situ Hybridization (FISH)/microarray results

    • Sponsor: Weill Medical College of Cornell University

    Current Primary Outcome: Efficacy of polar biopsy and preimplantation genetic analysis [ Time Frame: 1 year ]

    To determine the efficacy of PB biopsy and analysis by comparing the PB results to the FISH/microarray results


    Original Primary Outcome: Same as current

    Current Secondary Outcome: Safety of polar biopsy [ Time Frame: 1 year ]

    To evaluate the safety of polar biopsy by comparing the implantation, miscarriage, pregnancy, and delivery rates


    Original Secondary Outcome: Same as current

    Information By: Weill Medical College of Cornell University

    Dates:
    Date Received: March 16, 2012
    Date Started: September 2011
    Date Completion:
    Last Updated: June 10, 2015
    Last Verified: June 2015