Impotence is apparently grounds for divorce in 23 US States. But presumably not in the others---ladies be careful which US State you marry and live in!
But, of course, it is a very serious and upsetting affliction. What is the position in the UK?
There is no ground for divorce specified as impotence. Some women believe that impotence is unreasonable behaviour. I can see what they mean but of course it isn't. An existing problem concealed before marriage would be, as it is the concealing that is unreasonable. Also I expect that a refusal to attempt any treatment would be regarded as unreasonable behaviour.