Never turn it into a sob story about what you need. I'm working a couple of hours at night to finish the reports. The goal is to show how taking care of your family responsibilities will enable you to continue contributing to the bottom line. The Family and Medical Leave Act gives men the right to take a 12-week unpaid paternity leave. Part of the problem is thinking of paternity leave as maternity leave, where the mother takes all three months in one chunk.
Men can stretch it out by working four days a week over six months.
It's a matter of giving everyone as much advance warning as possible. Plan ahead with your supervisor, colleagues, and clients, so you can decide on the assignments to delegate and those to defer. You have a right to keep your intentions secret until the end of the pregnancy. But if you do, you're not a team player. You've said that fathers need to spend more time getting to know the people who take care of their children.