Thanks for your quick reply. We transfetred the 5 day Blastcyst. Doctor did the ICSI for us.I don’t know about assisted hatching .What is assisted hatching. We did the chromosomal testing before implating the embryo.[/QUOTE]
Sometimes they will do assisted hatching (basically breaking the outer shell) if the shell is thicker than usual. They do it to help the embryo hatch and doing that makes the rate of it splitting slightly higher. If you had it you would know because they would have discussed it with you and likely charged you for it. I am unsure if chromosomal testing would do the same thing or not. I am assuming it could though if in testing they penetrate the shell.
If I recall correctly the odds of a blast splitting though are less than 1%–so rare. That is one reason they prefer to transfer blasts because blasts are more stable and thus less prone to splitting than say a day 3 embryo.
I am unsure if the chromosomal testing would increase that rate or not, but even if it did I wouldn’t think it would be by much so would probably still be unlikely that it would split, but as you know with infertility anything is possible. it all works out positively for you though.