Oh my gosh. Okay.
I think that it should be something that is discussed between the couple. And if it's not, then that's their own personal problem, not a legal battle.
Sperm as a type of marital asset? What the hell is wrong with that woman? I'm sorry, maybe that's a little harsh.
I don't think there should be any kind of forms or required consent. I believe that if a man wants to donate sperm, then he should discuss it with his wife, but in the end, uhm, hello, his body, his choice. If the couple has a major disagreement with it, then that really is their own problem and the only law that should come into it is divorce if that is the path that they have chosen.
I agree with a few others, we can't use the whole "my body, my choice" statement on JUST women. A man has his own parts, his own assets, and he should be the one to make the final decision on whether or not he uses them.
The same goes for if a woman wants to donate her eggs. Discussion between the couple.