AFAIK, the only "woma" problem is not with the womas that most people have, but with NERD's "hidden gene" woma (which is NOT in any way related to the more common woma). The homozygous ("super") form of that is called the pearl, and they die shortly after hatching.
NERD hatched a pearl with no problem what so ever, I was told they still have to do more breedings to figure out exactly what they did to make it right, heres a pic i took of it...