This is a thread from ivillage. The admission from these women is a real eye opener. I think it's easier for a mother to be more honest when she's talking to other mothers. This really should be read by those who think they're ready or have unrealistic views about childrearing. You know who you are! It ain't all peaches and cream ladies.
http://messageboards.ivillage.com/n/mb/message.asp?webtag=iv-psw2woman&msg=7047.1
This link isn't pointing to the right thread for some reason. Just type in "regret having kids" in the search box at the top if you really want to read it.