Ay, 29cm at 29 weeks, that sounds right based sa normal development, pero best na i-confirm talaga with your OB sa next check-up para sure! A few of us mums nag-worry din about measurements, pero ang babies naman talaga ay nag-develop differently, so hindi always exact ang numbers, what matters is na consistent ang growth at lahat ay okay sa ultrasound. Don't stress too much, mama, pero definitely ask your doctor para peace of mind mo.