I used to use it all the time before I discovered MN in 2009.
It was a parenting website with talk boards, each board had a Community Leader who was a site user and their username was cl-something.
There were boards for pregnant women called Mums of Babies due X month plus lots of other boards.
There was a US and UK version.
I used it ALL the time, I can't believe I've forgotten what it was called!