Is there any baby fair coming-up in Makati malls?

None that I've heard of. I agree with Rea. If you want to attend baby fairs, you might want to visit nearby cities. However, I believe there are other bazaars, fairs and expos which will be held in Makati area in the next few weeks although they're not baby/family-centric. You make check this link for further info http://www.manilashopper.com/p/bazaar-expo-list.html?m=1