I'll admit, I've filled out an application before. It's definitely an extensive process. They have to know anything and everything about your history. After all, like sperm donors, women who can't produce their own eggs and are paying money for someone elses, and will want someone who is top of the line and most like them.
But, my general assumption is if you have never been a smoker, don't drink alcohol, and exercise normally, you're a good candidate.