Hi.my blood group is O-ve but my girlfrined's is A (+).and i would like to know if these blood group match?

The old "blood test" is antiquated. Of course they "match," (in that you can have children).

When is the blood transfusion taking place?

you can give her blood in fact, you can give blood to anyone, you are a universal donor.. but she can't give hers to you. She can only give to A+ and AB+

not really sure what you mean,

o neg is the universal donor, AB pos is the universal recipient.

why? are you planning on performing a blood transfusion. and no. O+ is universal

There is nothing wrong with it, there wont be a big problem nothing serious. Nothing to worry about!

im not sure what u mean, if you are thinking of a transplant you need a doctor

The rhesus factors do not match, so please ask a doctor before you do anything...which includes pregnancy.