What's so bizarre about this case is a. it's extremely unusual but b. there's no evidence about what happened to the pregnancy. The only established facts seem to be that she was pregnant at one stage and that she ordered a drug to induce labour. She's been sentenced for what it is assumed she has done, rather than for a proven crime. I can't think of any comparable cases. Even that awful case where the parents killed their daughter it wasn't until the body was found that they were prosecuted.
Abandoning the baby, having it adopted, telling her husband - these would all have been preferable, indeed, but she clearly wasn't thinking logically, was she? It's desperately sad (and with her previous history, you'd hope she'd opt for sterilisation - but again, that requires a degree of logical thinking).