﴿ أَوْ يُزَوِّجُهُمْ ذُكْرَانًۭا وَإِنَٰثًۭا ۖ وَيَجْعَلُ مَن يَشَآءُ عَقِيمًا ۚ إِنَّهُۥ عَلِيمٌۭ قَدِيرٌۭ ﴾

“or He gives both male and female [to whomever He wills], and causes to be barren whomever He wills: for, verily, He is all-knowing, infinite in His power.”

Or He combines them that is to say or He makes them males and females; and He makes whomever He will infertile such that she is unable to conceive or he cannot have a child. Surely He is Knower of what He creates Powerful in bringing about whatever He will.