It\'s a bit more technical then that. What if, and this is just a hypothetical as it has yet to be revealed in the comic, the virus is still out there and the first man born instantly dies from it? Embryo fertilization has to be done as a total last resort to the problem -- not to mention of course the amazon like women who feel men being gone is the best thing to ever happen to the human race have already gone ahead and wiped out a ton of sperm banks on the eastern seaboard of America. Who knows what\'s happened in the farmbelt or on the West coast or in any other country.