i am actually a single mama who has been going back and forth over this question in my mind. i would like another child and have settled on a bank as i couldn't find a known donor. anywho, it is tricky for me as i wanted another kiddo and i think i am going to settle with a donor outside of my race (i'm black) and the reasoning is so that i can try to have a child who is somewhat similar in features to my dd. it was hard to come to that conclusion, but i think that is where it lies at present.
but nothing is etched in stone as i am still considering the process...