Why a woman who procured an abortion would be punished:
-Because "it might appear scandalous that she should be able to deprive her husband of children without being punished".
-Digest 47.11
Because the thing is a bad example, lower-class people who give a drink to cause an abortion or to excite passion (although they do not do it deceitfully), are to be condemned to the mines, and more distinguished persons to be relegated to an island and deprived of a part of their wealth. If by this drink a woman or a man has died, they are condemned to capital punishment.
-Digest 48.19.38.5