We're not going to find out the sex of the baby before s/he's born. So theories abound.
In my family, the tradition is that the first name you latch onto is a clue about what yo're having. With Naomi, we thought of her name (acutally my dad thought of it) the within a few days of my positive test. Other pretty girl names came and went, but Naomi stuck to the end. Despite that, I was convinced I was having a boy. And I couldn't gather any enthusiasm for any boy names we thought of. I took the baby name book to the hospital with me. I was very invested in having a daughter someday, sooner rather than later, I hoped. Convincing myself I was having a boy was a hedge against disspointment.
This time I'm not that invested in either sex. I'd love another girl. Girls I know. Boys are trickier, but I'm sure whatever misgivings our doubts I would have about a boy would melt as soon as I set eyes on my son's face. Part of the reason I'm less enthusastic about having a boy is the circumcision fight I'm sure I'll have to have with Josh. (I'm not circumcising. No way. Call me inflexible, I don't care.)
A few weeks (months?) ago we fell in love with the name Milo and it's been our foregone conclusion boy name ever since. Girls names, of which I normally have many favorites, I have none of. So I've been getting very comfy with the idea that Newbie is a boy.
Naomi, on the other hand, always says we're having a girl baby. For kicks and giggles, we asked her what the baby's name is. She looked sideways, cocked her head, and came up with a name I've never heard before and can't figure out how to spell. Something like Mary-ah, with the emphasis on the first syllable. Mereya? Miria? If I could figure out how to spell it so she wouldn't be called Maria or Mariah or Mary, I would use it. I think it's gorgeous.