MPs for the governing Socialist Party along with those for the Left Bloc Communist Party and Greens and People-Animals-Nature voted in favour of the two laws.
When Parliament votes to pass legislation for a second time after a presidential veto, the president is then obliged under the country’s constitution to promulgate the law.
In a message to parliament when he vetoed the bills, the president argued that adoption by same-sex couples had not been preceded by a sufficiently wide public debate as well as stating that it has yet to be shown that the legal changes “promote the child’s welfare”.
In the case of abortion, Cavaco Silva argued that the bill would reduce the rights to information of a woman who is deciding whether to terminate a pregnancy.
Under Portugal’s constitution, the president must promulgate the legislation within eight days from its being returned to him.
That means that Cavaco Silva, whose term ends 9 March, must promulgate the two laws before he hands over the reins to Marcelo Rebelo de Sousa.