There was an article about that! :) Look back to the early to mid-'80's, prior to the end of 1985. The article focused on getting to know the person you were going to marry before the wedding took place. It mentioned asking questions concerning health conditions, etc., and if I remember correctly, even suggested having the other person take a medical exam. At the time I thought it was an odd article; I thought it was written specifically for cases like the one in this post. Sorry I can't be more specific about the article, it's been a long time since I kept track of WT literature.
The conclusion of the matter, all things having been heard, was that once you are married, that's it, even if you didn't know something about the other person that made it impossible to consumate the marriage.
AB