Children born to older parents tend to have fewer behavior problems

Since 1995, parents in many Organisation for Economic Cooperation and Development countries and in the United States have been having their first babies at a later age. Amid this trend in delayed childbearing, a new Dutch study considered the behavior problems of children born to older parents. Specifically, researchers looked at externalizing behaviors (e.g., aggression) and internalizing behaviors (e.g., anxiety, depression) of children born to older parents when the youth were 10 to 12 years old. They found that children of older parents tend to have fewer externalizing behavior problems than children of younger parents. The researchers also found that parents' age was unrelated to children's internalizing behaviors.

source https://www.lifetechnology.com/blogs/life-technology-news-blog/children-born-to-older-parents-tend-to-have-fewer-behavior-problems