I found a link to a study, which I posted, then I went back and edit my post. Sorry for any confusion. I just thought we needed statistics on this issue from an institute that surveyed a random group of women, rather than individual testimonies. I'm sure it happens, just in this day and age I like facts.
Edited to add: The statement surprised me. I've never had one, and have only personally known two women who have. Both of them were in loving, committed relationships. They just could not afford children. And Judge Judy sure showcases a lot of single "baby mommies"!