It's a hard one these days.
With such wonderful modern technology at our fingertips, many parents are keen to find out the sex of their baby so as to lessen the shock (sorry... I meant to say plan ahead). The nursery can be put in a gender-specific colour scheme, and the baby's wardrobe can be planned without including items that are sooo not the politically correct colour (but is there such a thing these days when it comes to gorgeous clothes for newborns!??).
On top of all that, it certainly helps in narrowing down the names list... well, at least from two genders to one!
Unless, of course, you're old fashioned like me and just want to have a bit of surprise on the night [or day, or early morning (and as if the breaking of waters isn't surprise enough when it's nowhere near your due date!!)].
Did you take a peek? Or did you adopt a-wait-and-see attitude?