J.W.
You could send an e-mail if you can't do the face to face thing. If that isn't an option you could always try the suttle approach and put you ultrasound picture on your desk with the calendar date cirled boldly in red. Or like at my Mom's office they did a gift thing durring their brake-a mini shower if you wanted to call it that. Someone came in with balloons. The boss can't be that oblivious to it. If you are really the shy type you could go to whom ever makes the schedule for vacations ect. and put in for your time off, and clearly write for maturnity leave. They have to give it to you. The best thing to do is just do it. Then you won't have the added stess of not saying anything. Congratulations! Enjoy your baby(s)!