I read the pregnancy books.
I threw them out after my first was born.
There are still things I refer to in books, but usually leaning toward baby names (although the list doesn't seem to have changed every time I check) and not so much toward the "how many pounds you should expect to gain" books. I have enough experience at this point to know how many pounds I should expect to gain;-)
You know... there are a LOT of things those pregnancy books don't tell you. Like how important chocolate and coffee are to the growth of your... um... morale! And any woman who's been pregnant will readily agree how important it is to measure the growth of your joy!!
I am not an avid coffee drinker, but I have been known to rely on a jolt of caffeine now and again (such as while cooking dinner with little ones under foot. Caffeine is more desirable than toothpicks to keep your eyelids open) but chocolate, (Safeway Rocky Road ice cream specifically) now that is a staple of an Analene pregnancy (hence the desire to steer clear of pound-counting literature)!
So far my children's brains seem to be fairly normal and the rest of their functions... function. So I assume that a certain amount of chocolate and coffee is probably good for the baby as well.
You know what they say "Whatever makes momma happy, makes the whole family happier!"
(or something like that)