My LO is 17 months old and still can't talk v well yet.. only know mama , drop, ba ba.. that's all .. he babbles most of the time . my mil keep stressing me, say why he is so old Liao still can't talk ? I'm v worried :(

My son at 18mo didn't know any of those words you mentioned - maybe just "mama" and "nehneh". We mentioned it at his routine development checkup at 18mo and got referred to speech therapy - then did a development assessment and found out he has isolated speech delay, meaning he understands very well but he doesn't know how to express himself in words or what words to use. Been about ... 5-6 months since we started speech therapy, he's improving but it takes effort from both parent and child :) I'd say it's not really something to worry about, but if you're uneasy with it just let the PD/nurse know at your next visit and then get it checked out!