Monogamous relationships

Are you in a monogamous relationship? Do you know many trans women who are in monogamous relationships?

In case it isn't clear, I'm trying to draw a distinction between monogamy and poly here. It seems like almost everyone I know is poly, and I'm trying to figure out if that's just generally how it is or if that's something specific to me (e.g., maybe where I live + the sort of people I associate with).