Originally a comment by Screechy Monkey on What would you spend that 9k on?

I have no idea about the health risks, but I think people are underestimating the privacy risks.

Anyone who donates eggs or sperm is incurring the risk that some years down the line, they or their family members will be contacted by the child. I don’t care what privacy protections you were promised when you made the donation, or even what laws exist in your jurisdiction to provide privacy — you don’t know what the law is going to be 20 years from now, and the general direction has been towards “I have a right to know my genetic heritage!”

More importantly, the law may be irrelevant, because the official clinic records won’t be needed in many instances. With so many people eagerly signing up to put their DNA in the databases of Ancestry.com and the like, it’s not going to be hard for people to find their genetic relatives. Even if you, the donor, are careful not to participate in anything like that, you can’t guarantee that your siblings or other relatives won’t.

Of course some people will view this as a positive thing. What could be better than one day discovering and getting to meet some new relatives, right? In which case, I guess, have at it, though note that any future spouse and children might not share your enthusiasm.