Originally Posted by
nuthinbutpink
It's really not something to spend time worrying about.
With FISH, it's due to human error. That happened on here and the other was from using day 3 CGH which should not be used for GS.
If you use Natera, because of the parental check part where DNA is verified, it won't happen. It won't with FISH either unless there is negligence of some sort.
There are risks to worry about, mostly it not working at all. About a 50% chance of that!!
It's the ONLY way to get a guarantee. That's why we pay "all that money". And no, there's no stats for worst case scenario. It's happened once for FISH and twice for day 3 CGH. The day 3 CGH can be avoided.
Lots of things to worry about but that's not one of them.