Time to donate again?

I've got a question out with the clinic, do they need me to donate again?

I'd like to get to my ten family limit, and most importantly if any of the existing families I've helped would like another brother or sister more donations may be required.

As I've mentioned before, I think it is important for siblings to share a common genetic background - I know how I'd feel if I was a donor conceived child, I'd feel more secure if I had the same genetic Father as my brother or sister.

I'll probably have a vasectomy once our family is complete. Though that may be with this pregnancy, or perhaps the next? Who knows?