Whoever, whether male or female, apostatizes from Islam must be killed, because the Messenger of Allah (SA) said, “He who changes his religion (that is, apostatizes), kill him.” 1663
They are not killed until their repentance is sought for three days;
then they either repent or are executed by the sword.
وَمَنِ ارْتَدَّ عَنِ اْلإِسْلاَمِ مِنَ الرِّجَالِ وَالنِّسَاءِ، وَجَبَ قَتْلُهُ، لِقَوْلِ رَسُوْلِ اللهِ : "مَنْ بَدَّلَ دِينَهُ فَاقْتُلُوهُ" لاَ يُقْتَلُ حَتَّى يُسْتَتَابَ ثَلاَثًا، فَإِنْ تَابَ، وَإِلاَّ قُتِلَ بِالسَّيْفِ.