Forumi Horizont (http://www.forumihorizont.com/index.php3)
- Mjekësia (http://www.forumihorizont.com/forumdisplay.php3?forumid=266)
-- medical sciences (shkencat mjeksore) (http://www.forumihorizont.com/showthread.php3?threadid=8624)

As i remember, dogs has also a cycle. But it is called ESTRO, because they dont bleed. Simply the uterus wall is absorbed by the organism so we dont see bleeding like the human female.

For the last judgment lets wait for ns-6, cause I dont remember exactly if the human female is the uniqe one to have menstruations.