sex?? geez.. I'm actually suprised I even got pregnant! I guess my situation is a little different than most as I only have sex (before babe and after babe) only ONCE every three months! I've actually been looking for a replacement... It has nothing to do with babe... I'm definately very sexual.. he just isn't... He is a good dad though, and I couldn't ask for more... but, yeah, looking for the good lovin' somewhere (even if it is alone....)
ETA: I started my period 3 months after my guy was born, and, for the most part, I think your period returns because it feels as though it needs to start producing babies again.. even if it's not something you want! I've learned that, mostly anyway, whenever you feel horny, you're most likely ovulating!