The latest prediction...

... according to this very reputable source:

We have a 42% chance of having a boy.
And we have a 57% chance of having a girl.

Warning: Warning: Warning: Scary personal details, all from an early stage, follow. These answers are claimed because:

You are carrying the extra weight out front, so it's a boy.
The hair on your legs is not growing any faster during your pregnancy, so it's a girl.
Sleeping in a bed with your pillow to the south indicates that you will be having a girl.
Your feet are not colder than they were before pregnancy. You are having a girl.
You refuse to eat the heel of a loaf of bread. You are having a girl.
Dad-to-be is gaining weight right along with Mom-to-be, which means that you'll have a boy.
The maternal grandmother doesn't have gray hair (dyed or natural), so a girl will be born.
You didn't have morning sickness early in pregnancy, so it will be a boy.
You are not looking particularly good during pregnancy. Therefore, it must be a girl, because girls steal their mother's looks.
Your chest development has been quite dramatic during pregnancy. You should expect a girl.
Since the sum of the mother's age at conception and the number of the month of conception is even, it will be a boy.
Your urine is a dull yellow color, so you will have a girl.
You have a craving for salty or sour foods, which means that it is a boy.
Your nose hasn't changed during pregnancy, which indicates a girl.
You have been craving meats or cheeses, so it is a boy.
You have no desire for orange juice, so it's a boy.
You are not having headaches, so it's a girl.
You show the back of your hand, so it's a boy.
You use the body of the mug, so it's a girl.

dad seems to recall that Plato, Socrates, or Aristotle predicted the way to make a boy or a girl, something along the lines of the way the mother was facing. He can't find the reference, but, coincidentally, also remembers one of those guys saying that one sex had more teeth than the other. They never counted.