since the referendum in 1992, the constitution specifically states that someone has the right to travel to another country to avail of a service which is legal in that country.
I think I remember seeing something in the US where the mans wife was an alcoholic and he got an injunction to have her hospitalised while she was pregnant to protect the child from Fetal Alcohol Syndrome, think it was a pretend story on one of those law shows, but he won. Found this article if its any good http://query.nytimes.com/gst/fullpage.html?res=940DE1DE133BF931A15757C0A96E948260 even though its us versions. Good luck with the story