Constitutional Amendment G would provide a trimester framework for legalizing and regulating abortion in the South Dakota Constitution.

During the first trimester of pregnancy, the state would be prohibited from regulating a woman's decision to have an abortion. During the second trimester of pregnancy, the state may regulate abortion, but "only in ways that are reasonably related to the physical health of the pregnant woman." And during the third trimester of pregnancy, the state may regulate or prohibit abortion, except "when abortion is necessary, in the medical judgment of the woman's physician, to preserve the life and health of the pregnant woman."