If they'd been told that the chances of it coming off successfully were great, and there was nothing to worry about, then it'd be right to say that they'd been tricked into agreeing,and that there wasn't informed consent. But that does not appear to have been the case. Ladan and Laleh knew what was involved, it appears, and they chose to take that risk.

Incidentally, I note the implicatioin from a few people that the level of medicine in a Singapore Hospital can't possibly be as good as "in the west". A curious assumption.