If you haven't, you're not alone. But it's one of the most important things you can do. It's a good idea to work on issues that are sources of contention before the baby comes along. Work hours are a good example. This issue often causes tension in a couple, especially if the mother is staying at home, even temporarily.
Resentment can build.
The woman may feel the father isn't doing as much as she is or helping out as much as he could. In reality, both partners need support after the baby is born. That's why it's a good idea to plan ahead for ways to help each other. People often say they'll work it out when the time comes. But when the time does come, there are so many other emotions at play, along with the added stress of sleep deprivation, that tempers flare and resentment builds.