When I was a folklore graduate student (ages ago) I wrote a thesis on metaphors used to describe love and lovers in Anglo-American folksongs. As part of my research I looked at who sang what. There were no clear divisions or alliances between the point-of-view of the protagonist and the gender of those who had sung or would sing the song. Many times a male singer would sing some "woman's song" because he got it from his grandmother or aunt or mother.

We should not assume that only women wrote or sang about pregnancy, wanted or unwanted. Men, after all, have mothers, sisters, daughters, for whom this may be an issue. And, of course, there are incest ballads.