They are a member of the Women's Flat Track Derby Association.

Slaughterhouse was accepted as a member of the Women's Flat Track Derby Association early in 2009.

But team managers, players and a spokeswoman for the Women's Flat Track Derby Association agree: they are seeing a modest rise in mothers joining leagues.

The league was accepted as a member of the Women's Flat Track Derby Association in December 2008.

The league is among the original members of the Women's Flat Track Derby Association.

They played their first full season in 2008, and became a full member of the Women's Flat Track Derby Association the following year.

With more than 30 leagues nationwide forming the Women's Flat Track Derby Association.

They are members of the Women's Flat Track Derby Association and play under the association's rules.

In July, it was accepted as an apprentice member of the Women's Flat Track Derby Association.

They were early members of the Women's Flat Track Derby Association, competing in the East Region.