14 months, but it is a little bit more complicated than what OP implies.
The mother gets 14 weeks (6 weeks before due date, 8 after) that is the "proper" leave and is mandatory for the mother.
After that, one or both parents can choose to take a leave where the government pays you 2/3 of your net salary, capped at 2000 EUR. If only one parent takes then it is limited to 12 month and it is extend to 14 months in case both parents decided to take it.