I’ve been part of a medical study since before I was born. AMA
Not sure if this is something people are curious about, but when my mom was pregnant with me she was asked if my growth could be monitored as part of a huge study (thousands of babies).
Every few years I get a bunch of tests done. I’ve had allergy tests, blood drawn, bone scans, ultra sounds of my heart. My brain activity has been measured, my breathing, stamina. Also mental state through a BUNCH of questionnaires and conversations with therapists. Even an MRI two times already (and a third one coming up). Plus a huge amount of other tests, but these are the ones that came to mind right now.
When I was a child I loved it because I thought it was really cool. Then I became a teenager and HATED it (i had to answer questions on a computer about the development of my boobs, something you are not comfortable with at 13 years old). Now that I am an adult I am mostly thankful for the very thorough check up I am able to get every few years.