AUGUSTA — Abortion foes and those who support women’s reproductive choice will each mark the 40th anniversary of Roe v. Wade, the landmark decision that created a constitutional right to abortions in some circumstances and prevented states from banning the practice.

In Augusta, the Maine Choice Coalition plans a news conference Wednesday to celebrate the decision. Speakers will address the history of the issue and the work of the coalition in 2013 and beyond.

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On Thursday, more than 100 Maine Catholics will begin their journey to Washington, D.C., to participate in the 2013 March for Life, which is set for Friday afternoon following a noon rally on the National Mall. The march is an annual event protesting abortion on or around the anniversary of the Supreme Court’s 1973 decision.