exception

Il fait une exception et permet l'avortement lorsque la vie d'une mère est en danger.

(countable, uncountable) The act of excepting or excluding; exclusion; restriction by taking out something which would otherwise be included, as in a class, statement, rule.
(countable, uncountable) That which is excluded from others; a person, thing, or case, specified as distinct, or not included.
(countable, uncountable) An objection, on legal grounds; also, as in conveyancing, a clause by which the grantor excepts or reserves something before the right is transferred.
(countable, uncountable) An objection; cavil; dissent; disapprobation; offense; cause of offense.
(countable, uncountable) An interruption in normal processing, typically caused by an error condition, that can be raised ("thrown") by one part of the program and handled ("caught") by another part.