There are many different types of developmental delays in children. Some problems include language or speech, vision, movement, social and emotional skills and cognitive skills. There are different warning signs for different types of delays that could appear from infancy to age two. There are various causes of developmental delays and potential treatments. You might be surpirsed to learn that some delays includeexposure to more than one language — which can cause mild delays in toddlers but not delays by the time they reach school age. Other delays are a learning disability, a problem with speech, hearing loss which could be from infections, trauma, medications or genetic disorders, autism spectrum disorder (which includes social interaction and cognition skills).