Well, the Yes posters are very clear what they support: expand medical care and give women choice. Almost nobody is "pro-abortion", supportive of abortion as a systemic policy, in any country actually; I suppose some anti-natalist governments were. But this is a distinction many are content to miss in order to promulgate the usual myths about politicians being lyin' Hillarys, or a psycho Jewish Soros conspiracy.
You're missing the point entirely.
Yes favours expanding medical care for and giving women choice to do what exactly? The what matters here. It's not giving choice to obtain codeine cough syrup or expanding palliative care. Its choice to obtain an abortion.
The fact that Yes is avoiding the relatively neutral "A word" in their campaign, while No is banging the drum on it says a lot about the state of Irish culture. Yes euphemizing what their cause is indicates that the Irish are not nearly as comfortable with abortion as they are gay marriage as Observer indicated.