After DD#1 it took 28 months for AF to return. I know thats rather long, but my daughter was voracious for her "chi-chi". It wasn't until I was pregnant with DD#2, that she started to eat more food. I had my hormones checked to see if I was peri-menopausal, but apparently not.
i'm 9.5 months PP and no AF yet, at about 6 months PP i bled for like half a day and never had anything else, i do think i am ovulating, i have cramps every 41 days ( my old AF was exactly 42 days, no more, no less) and DH says i get PMS, so i killed him (