Why "un" copil and not "o" copil?
Because it is a masculine noun, and those use 'un'. The feminine ones use 'o'.
Oh, simple as that! Thanks, sorry for the "newbie" question :)
If it is a female child, does that change the outcome?
You can use „un copil” for both genders.
There is a feminine version of the noun, „o copilă”, but it is not used very often.
That is not really an accurate answer to the question, for how do you know "copil" is masculine.
If it is possible to reply, I would be very grateful.
I truly am curious to know.
Maybe it's like how sometimes we say "him and I" and sometimes we say "him and me". It depends on the sentence.