reports." sperm banks have made it possible for any donor to be a father without any strings attached. for some sperm banks that are running low on doe norris, they're relying on the same donor over and over. now one donor can lay claim to fathering 150 children. the practice is raising some serious questions against critics. here's george lewis. >> reporter: sharon from seattle had two children via artificial insemination from the same sperm donor. >> how did mommy get the sperm? >> goog. . >> reporter: it wasn't quite that random, but in a documentary airing the 27th of this month on the style network, sharon discovers the buy logical father of her children, a guy named ben living in boston has many, many others. >> to date i know of 70 kids. >> reporter: but ben doesn't hold the record. "the new york times" reporter jacqueline discovered one donor