I have just realised I have not taken ds2 who is nine months old for his eight month check yet. Looking at his health record book it says that a 7-9 month old should be babbling. It has just dawned on me that the only sounds he makes are crying and laughing. No babble at all, just occasional cooing. Do you think I should be concerned? I can't remember (as always) what ds1 was like at 9 months.