thinking of you and your little girl...
From what I understand, there are a few theories for mosaicism, but mostly, its that the male/female cells started out normally, and then something happened during the first few divisions...
You were working in an incredibly toxic environment with your other losses, that could have had to do with those losses...this time you weren't and unfortunately had bad luck...next time, it will be perfect - I cant wait till you have that perfect little bean in there!
Glad you are back, missed ya on here