As we heard in the episode there are certain developmental milestones that children are supposed to reach at certain ages, like taking their first steps by 12 months. Doctors use the term developmental delay when a child doesn't reach developmental milestones within the broad range of what's considered ‘normal’.

 

The delay might be in one or more areas, like for example in their gross and fine motor skills such as jumping and stacking blocks or in their communication and language skills - both ‘receptive’, which relates to understanding, and ‘expressive’, which relates to speaking. It could also be in the area of self-help skills like toilet training and dressing, as well as in their social skills, such as making eye contact and playing with others.