أَو يُزَوِّجُهُم ذُكرانًا وَإِناثًا ۖ وَيَجعَلُ مَن يَشاءُ عَقيمًا ۚ إِنَّهُ عَليمٌ قَديرٌ

Or He makes them [both] males and females, and He renders whom He wills barren. Indeed, He is Knowing and Competent.