The man's vote doesn't count.
Legally in the U.S. only the woman has the right to make such a choice. Even if the man wanted his girlfriend to have a child he could not force her to carry a child to term. Legally it's her body and her choice.
There is no such thing as an accidental birth. A birth takes place only if the (woman) wants it to. It's not up for discussion.
However I'm sure many people may be wondering in this day of modern medicine and multiple birth control methods along with the Plan B pill...etc How is it possible for the same woman to have two unplanned pregnancies out of wedlock?
Were both people doing everything possible to avoid this scenario? Hopefully after she has the child she won't tell it that their father didn't want him or her.