Comparative Genomic Hybridisation
CGH (Comparative Genomic Hybridisation) is a new egg-screening technique which involves selecting eggs which are chromosomally normal and have the best chance of producing a pregnancy.
How does CGH work?
Basically, a laser cuts a hole in the edge of the ovum and then, using a pipette, the polar body is sucked out.
The chromosomes found inside the polar body should be a mirror image of those left in the ovum. So by analysing the polar body, scientists can determine what is left behind in the ovum, without disturbing it.
Thus, upon examining the polar body they find, for example, that there is a chromosome missing from the ovum, then any subsequent embryo will fail, even though it looks healthy using the microscope.
Experts believe the technique could significantly improve a couples’ chance of having successful fertility treatment.
Have you tried comparitive genomic hybridisation? If you have share your experience with all of us here!
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