By day 5/6, when your embryo grows to become a blast, the cells are divided into
1) Inner cell mass - which later becomes the baby
2) trophoblast - the part that becomes placenta
You can just biopsy the trophoblast.
However, here comes the trick. There are already papers pointing out that the representation of mosaicsm is much higher in the trophoblast layer, and ICM could be very normal when trophoblast returns result of abnormalty. As a result, you may get false negative.
The trophoblast testing is standard practice for all day 5 genetic testing, nothing special with CCRM or ORM or RMANJ, all the clinics that offer day 5 testing do the same thing.
|This message has been edited by miraclex2 on Aug 9, 2012 6:01 PM|