Do women have different pituitary glands?

We just had our second son less than a week ago... Which means we don't sleep much.

But somehow no matter how groggy and beat up I feel when I have to get up with the baby, my wife is completely awake. She may not be chipper and happy, but she has all faculties up and firing on all cylinders. Whereas I spend the first ten to fifteen minutes trying to understand what is happening. I think this is because she has a malfunctioning pituitary gland that doesn't register what time of day/night it is. This is the only way a person can be "awake" when they are aroused from deep slumber at 3am. I am guessing it is a side effect of the pregnancy.