You might be inclined to keep your pregnancy as unnoticable as possible in the office, performing your work the same as you ever have. That's fine, but talking about your leave is good for everyone. While the paperwork ensures your job will be there when you get back, doing the communications prep ensures your 12 weeks of sleepless nights will only be caused by that sweet new baby.
December's article will cover how to "leave" your home office, if you work for yourself. Stay tuned!