Children reach developmental milestones at their own pace. Minor, temporary delays are usually no cause for alarm, but an ongoing delay or multiple delays in reaching milestones can be a sign there may be challenges later in life. Delay in reaching language, thinking, and motor skills milestones are called developmental delay. Developmental delay may be caused by a variety of factors, including heredity, problems with pregnancy, and premature birth. The cause isn’t always known. If you suspect your child has a developmental delay, speak with their pediatrician. Developmental delay sometimes indicates an underlying condition that only doctors can diagnose. Early intervention will help your child’s progress and development into adulthood. As in most other areas in medicine, the approach to making a diagnosis involves a detailed history and physical examination. Specific points in the history and physical examination are highlighted below. While the list of potential investigations for mental retardation is large, the choice of tests can usually be targeted based on information gathered during the evaluation. The value of diagnostic imaging with computed tomography or magnetic resonance imaging (MRI) in a nondysmorphic, mentally retarded child who has a normal head circumference and no abnormal neurological symptoms or signs is unknown. Citations are important for a journal to get impact factor. Impact factor is a measure reflecting the average number of citations to recent articles published in the journal. The impact of the journal is influenced by impact factor, the journals with high impact factors are considered more important than those with lower ones. To increase the visibility and ease of use of open access scientific and scholarly journals PrimeOA Publications top online publishing journals are indexed in different indexing and archiving services.