11. Many of the toddlers from welfare families showed developmental delays , the study said. 12. Exposure to mercury can cause numerous neurological problems, including developmental delays among children. 13. Complications from argininosuccinic aciduria may include developmental delay and mental retardation. 14. Structural abnormalities of the brain lead to seizures, profound developmental delay , and mental retardation. 15. Therapy can help developmental delays , as well as physiotherapy for the low muscle tone. 16. The girl likely will have problems with relationships and developmental delays throughout her life. 17. These kids will never pull out of their developmental delays . 18. I wasn't surprised : For many developmental delays , no specific cause is ever found. 19. It is also associated with abusive caretaking, developmental delay , mental illness and subsequent suicide. 20. Robert and Damian are slow in speech and likely will have other developmental delays .