thank you for your reply. you can contact me at firstname.lastname@example.org...I am hoping all goes well with this pregnancy. I dont know how my son's blood came about. My whole family is + I am the only negative. My husband is O+ and me AB-, so i dont know how he got the A-, my doctor is sooooo old and he said he has never ever came across another AB- before....so....i think its extremely rare in MalaysiA!