"We do not have sufficient sperm donations in reserve to meet all the requests"

http://www.breitbart.com/news/2005/12/06/051206063657.dlbc8f6d.html

The two women took turns having the babies, admitting that it was expensive to make repeated trips to Brussels for inseminations.

They said they do not envision telling their daughters about the name of the sperm donor as "it would only add confusion," Blanc said.