What are the key signs of slow development for a 12-month infant?
* Can't sit up from bed
 * Can't stand without support
 * Can't walk with support
 * Haven't grown teeth.
 * Really fussy at night.
 * Resist solid food or choke on solid food.
 * Can't say word like dada, gaga, kaka, baba, mama.
 * Don't react to his/her name.
 * Don't recognize his/her caregivers.
 * Still need to take two naps a day.