This Directive is without prejudice to the right of Member States to recognise distinct rights to paternity and/or adoption leave. Those Member States which recognise such rights shall take the necessary measures to protect working men and women against dismissal due to exercising those rights and ensure that, at the end of such leave, they are entitled to return to their jobs or to equivalent posts on terms and conditions which are no less favourable to them, and to benefit from any improvement in working conditions to which they would have been entitled during their absence.