The first question we usually ask new parents is : Is it a boy or a girl ?. There is a great answer to that one going around : We don't know ; it hasn't told us yet. Personally, I think no question containing either/or deserves a serious answer, and that includes the question of gender.

Gender Outlaw: On Men, Women and the Rest of Us (ed. Routledge, 2013) - ISBN: 9781136603747