In a Pro-Choice society, should fathers have any legal responsibility?

Unfortunately, this issue has long been defined by the feminists as one of "choice", not responsibility. Or an issue of "their body" (certainly not an issue of reproductive rights, or of life or death). So if we're going to look at this issue in terms of responsibility, particularly for men, then consider:

In stark contrast to women (and choice), men have no choice whatsoever. None. Zip. Nada too. In our society, all of the reproductive decision making power resides in the female. Men get no veto, no vote... no rights whatsoever. And without rights, responsibility is difficult to impose- perhaps even unjust.

What if we changed these rules so that men had both greater rights, and greater responsibilities?

What if men had a vote in the birth of their child? If a man voted yes, and a woman voted no - the man would be responsible for raising the child. (and vice versa)

And if the man voted no, he also would know of his own personal responsibility.

Maybe, just maybe a baby would be saved.

Yes. Unless, of course, we want society to continue down the path to destruction. Being hostile to the family unit (as it is the cornerstone of society) is a great mistake. Modern liberal ideologies strive to drive a wedge between men and women. After feminism took root, it was only a matter of time before men realized that its ideologies try to remove any dependence women have on men, yet fail to actually remove dependence and instead remove respect and appreciation for the male gender—thus resulting in your question.

The truth of this matter is that men and women are dependent on each other and are made to be together. We should respect one another and appreciate our need for the other gender. Feminist liberation is a 'pipe-dream', a means to an end that doesn't really exist. This quest for independence is a fruitless one as we are all dependent on exterior contingencies for survival—no matter who we are! We, as humans, should be more humble. (Both genders, of course)

There is no doubt in my mind that marriage isn’t the right path for everyone—but it’s the only responsible thing to do if you plan on having sex. Being sexually promiscuous is irresponsible and society should be holding these people responsible for their actions. It doesn’t matter how ‘protected’ you are, when you engage in an action that creates life you should be prepared for the consequences of that action.

The rift that feminists are trying to create between the two genders does not validate the exclusion of male accountability—rather it makes it all the more pressing that we fight such a notion! And let’s not forget that there is a third human being involved in this scenario. We should be putting aside our differences to take care of it.

Once the male parner walks(note I din't say father) The woman can do anything she wants. You can make a sperm donor into a father.