And that He creates the pairs, male and female. From Nutfah when it is emitted.
as He said;
أَيَحْسَبُ الاِنسَـنُ أَن يُتْرَكَ سُدًى
أَلَمْ يَكُ نُطْفَةً مِّن مَّنِىٍّ يُمْنَى
ثُمَّ كَانَ عَلَقَةً فَخَلَقَ فَسَوَّى
فَجَعَلَ مِنْهُ الزَّوْجَيْنِ الذَّكَرَ وَالاٍّنثَى
أَلَيْسَ ذَلِكَ بِقَـدِرٍ عَلَى أَن يُحْيِىَ الْمَوْتَى
Does man think that he will be left neglected? Was he not a Nutfah? Then he became an `Alaqah (something that clings); then (Allah) shaped and fashioned (him) in due proportion. And made of him two sexes, male and female. Is not He (Allah) able to give life to the dead? (75;36-40)
Allah the Exalted said,
وَأَنَّ عَلَيْهِ النَّشْأَةَ الاْأُخْرَى