I will say this -- as a regional alumnae supervisor, I received an onslaught of angry phone calls, emails and texts after our statement was released. The members were downright incensed that the org made a statement. I, too, have a couple of members who are considering resignation over it.
As andthen pointed out, it's a no win situation. As *winter* said, "Reproductive rights is a VERY emotional issue for women. People on both sides of the issue often have strong feelings for personal reasons." This is one of the topics that is deeply personal and adherents on either side are highly unlikely to budge as both believe they are morally right. If your org wasn't expressly formed to be a political vehicle, then tread carefully. Picking a side will lose half of your audience and create a lot of damage, as I am now seeing myself.