Hello House, need an urgent response on the issue explained below.

I have a girl that I planned to marry but genotype test result blurred the dream of being together. What I'm saying is that recently after the agreement of two couple to be , they went for their genotype test, and the result shows that both of them are AS which means that if they insist, their is tendency of producing a sickle seller which they are avoiding and the love is now so deep that they dont know how to quit the relatioship. Now the question is what should the guy do?
And to the girl, what should she do?