I am used to seeing plenty of research and studies center on millenials, but recently, there have been lots of studies released that focus on the pathology, health and well-being of first born children.
And of course, as a first born myself, I am fascinated.
Here is a sample of the few I found:
First borns are more nearsighted (CBS)
First Born children are more likely to be overweight (ILF Science)
Birth of a First child can make parents unhappy (CBS)
First born children feel more pressure to achieve (Pacific & Standard)