[Aristoddler]

It varies from country to country.
Most often, abortions are legal in the first trimester only. An abortion in the second trimester is something that usually (again, varies from country to country) requires a medical expert's consent, with justification. Third trimester abortions are rare in almost every country, unless the mother's life is at immediate risk.

You can find information regarding this topic in your country's criminal code under Family Law.

Switzerland and Ireland are the only two places that I can think of, where it is 100% illegal unless the mother's life is in jeopardy.