Out of Wedlock?

Question...What level of obligation does a man have to the mother of his child if they are no longer together. Allow me to put a little more context to this question. Lets hypothetically say that boy meets girl, boy and girl get together and have a nice little fling, eventually the romance dies shite happens and boy and girl part ways. About a month or so girl finds out she's totally knocked up. She of course tells boy and they try to find a way to get back on good terms for the sake of the baby. What obligation, if any, does the guy have to be there for the girl during the pregnancy. Are there certain things that should be a given or should he be able to decide if, when, and what he's going to do (of course the fact that he gets a choice in the matter is a luxury within itself, but that's another blog). Should the girl expect that she can depend on things like him driving her to the hospital when its time. Or having him in the room when the baby is born. Coming to lamaze classes with her. Since it is his baby shouldn't he be expected to do those things? Or is it wrong for a woman to expect such things from a man that is simply the "father of her child" and not a boyfriend or husband? What about after the fact, is it outlandish to expect the boy to take off work a few days to be "around" or maybe to stay around the first week or two to help out? I realize this subject is highly subjective, but I'm rather curious as to what you all think the "role of the BD" should be?

Disclaimer to mitigate any and all rumors before they start: This blog is in no way a representation of the poster's life. All characters, details, and situations are a pure result of my overactive mind and quest to be all deep and thought provoking. The terms "boy" and "girl" are not real names, simply nouns used to describe a male and a female (i swear, you can look it up). This blog is not in any way whatsoever a reflection of my life, nor the life of any of my friends, family, associates, monkey minions, evil robots, demon fish, or co workers. I just want your thoughts ;-)