Any pregnancy is a good pregnancy, whether boy or girl. When I first got married, I thought, "Oooh, I want a boy because my husband's an only child and so is his father...that would keep the family line going if we have boy!" (Well, the truth of the matter is the family line keeps going even if there's a girl!) It wasn't until we got ready to do the sonogram to find out the gender that I thought, "You know what, I don't care if the baby is a boy or girl...we're still having a baby!" Of course, we had trouble conceiving, so by that point we were happy to be pregnant.
There is a book called "How to choose the sex of your baby" - or something like that. I don't know if it works or not, but the person who lent it to me believed it did as she had 2 kids, and tried to "time it" so she'd have a boy and she did.
Hope everything works out for you guys! Good luck!