are you a middle child i.e. you are not firstborn or lastborn. i'm curious about birth order and epidemiogies. a broad question, so if there were family structure changes when you were growing up, apply poll question to from birth to age ten.
if you are a middle child, and your othere siblings were ALL opposite gender to you, please specify.
if you are 'neither - it's complicated', please do tell!
thanks..!