I don't believe anybody should be forced into parenthood, nor should somebody be forced into financial responsibility for an unwanted child.
A woman should have the right to abortion and the decision of whether or not to abort has to be hers alone. As a man has no choice in whether or not a woman has an abortion, he should at least have the right to bear no responsibility for the child.
At the same, you have to provide enough protections so that a man couldn't simply walk out on a child after it's born or change his mind shortly before its birth. This is where things can get messy.
The best solution I can come up with would be some form of contractual arrangement made during pregnancy. A man could waive his rights and responsibilities towards the child or he could commit to providing for the child once it's born. This way, neither person is forced into supporting a child they didn't want and the father couldn't back out of his responsibilities if he agreed to help with the child. Nor could a man who waived his responsibilities demand to spend time with the child if the mother didn't want him to.
There would still be plenty of issue to work out with that system though: What do you do about couples who share a household? How far into a pregnancy can the father wait before he has to make a decision on the contract? What do you do in situations wherein the father was unaware of the pregnancy?
These are issues that don't have easy answers in my opinion, so any form of legislation would have to be thought through very carefully.
On a slight tangent, both men and women should also have the right to sterilisation as soon as they're old enough to legally have sex. This is something that often gets overlooked in discussions about reproductive rights in my opinion.