Developmental Delay in children is dreaded by parents, as it can mean some serious disorders are involved, mostly incurable. Delays occur when your child does not reach their developmental milestones at the expected times. Delay can occur in one or many areas—for example, gross or fine motor, language, social, or thinking skills. Developmental Delay is most often a diagnosis made by a doctor based on strict guidelines. Usually though, parents are the first to notice that their child is not progressing at the same rate as other children the same age.