You're heartless Spok. PC is kidnapped by robots with his imposter posting here and you tell me I'm off topic. Psh...Took me over an hour of looking through my Calibre archives turning my computer on just for you and I get back to you saying that to me. Not so nice.
Anyway most of these barely fit but some are close:
3 chapters of Bun-Fu fighting within
http://www.fanfiction.net/s/4697579/10/Et_Cetera kind of loosely count. Ranma dies but his memories go to Chibi-Usa who becomes like Ranma. Not biologically his but it is him and she does go back in time. Really loosely what you want though.
Daughter pops in for a second at the end of this great spoof fic
http://www.fanfiction.net/s/4378356/1/M ... ter_Ryouga . Really minor though.
http://www.fanfiction.net/s/2962506/1/M ... _Challenge sees her child before it's born. Kid doesn't travel in time or anything though. But...seeing the kid before it's born or conceived kinda sorta counts?
I'm thinking one of the enemies in this
http://www.fanfiction.net/s/4836215/1/Polarity is Ranma's kid (or maybe husband) from a past life. But there's no confirmation and I could be dramatically off.
Ranma has a past/future kid in this
http://www.fanfiction.net/s/4945319/1/R ... Adventures it's slightly confusing. No back to the present yet but considering all the time travel it's bound to happen if it ever continues...
http://www.fanfiction.net/u/9003/Kaoru_Shimitsu think that's in one of the Fragile Clays...not sure though wasn't a big fan so could be totally off base. Think it was mentioned in one of the weird 'god, scenes. But I hated those and didn't read them.
http://www.fanfiction.net/s/2162807/1/Happily_Married Ranma goes into the future not her child and meets her baby. Kind of counts? (Had wrong story linked sorry if anyone clicked it before I edited in the right one).