Polar Body Biopsy for Preimplantation Genetic Screening

Study Overview
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Brief Summary
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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 Description
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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 To evaluate the safety of PB by comparing the implantation , miscarriage, pregnancy, and delivery rates To determine the error rate of FISH analysis by analyzing the remaining cells in embryos determined to be abnormal by initial FISH/microarray analysis

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

Conditions
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Aneuploidy

Intervention / Treatment
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* Procedure: Polar body biopsy with PGS


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Are undergoing IVF/Intracytoplasmic sperm injection(ICSI) Are considering preimplantation genetic screening for aneuploidy Are between ages 18 and 42 inclusive (female partner) Exclusion Criteria: Using sperm from a testicular source Fewer than 10 oocytes retrieved Fewer than 6 oocytes fertilized normally Complete fertilization failure (no oocytes fertilize)

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 42 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Polar Body Biopsy with PGS<br>Polar Body Biopsy with Pre implantation genetic screening | Procedure: Polar body biopsy with PGS<br>* PB biopsy and analysis by comparing the PB results to the FISH/microarray results<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Efficacy of polar biopsy and preimplantation genetic analysis | To determine the efficacy of PB biopsy and analysis by comparing the PB results to the FISH/microarray results | 1 year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Safety of polar biopsy | To evaluate the safety of polar biopsy by comparing the implantation, miscarriage, pregnancy, and delivery rates | 1 year | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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PGS,PGD, IVF, Polar Body Biopsy, FISH, Microarray analysis