I suppose they're referring to this:
The Believers - سورة المؤمنون
[23:14] Then We made the sperm-drop into a clinging clot, and We made the clot into a lump of flesh, and We made from the lump, bones, and We covered the bones with flesh; then We developed him into another creation. So blessed is Allah, the best of creators.
Or this:
The Troops - سورة الزمر
[39:6] He created you from one soul. Then He made from it its mate, and He produced for you from the grazing livestock eight mates. He creates you in the wombs of your mothers, creation after creation, within three darknesses. That is Allah, your Lord; to Him belongs dominion. There is no deity except Him, so how are you averted?
Or this:
The Pilgrimage - سورة الحج
[22:5] O People, if you should be in doubt about the Resurrection, then consider that indeed, We created you from dust, then from a sperm-drop, then from a clinging clot, and then from a lump of flesh, formed and unformed - that We may show you. And We settle in the wombs whom We will for a specified term, then We bring you out as a child, and then We develop you that you may reach your time of maturity. And among you is he who is taken in early death, and among you is he who is returned to the most decrepit old age so that he knows, after once having knowledge, nothing. And you see the earth barren, but when We send down upon it rain, it quivers and swells and grows something of every beautiful kind.
Nothing but vague descriptions that do not prove that the Quran is divinely inspired, nor that Allah is real.
The Believers - سورة المؤمنون
[23:14] Then We made the sperm-drop into a clinging clot, and We made the clot into a lump of flesh, and We made from the lump, bones, and We covered the bones with flesh; then We developed him into another creation. So blessed is Allah, the best of creators.
Or this:
The Troops - سورة الزمر
[39:6] He created you from one soul. Then He made from it its mate, and He produced for you from the grazing livestock eight mates. He creates you in the wombs of your mothers, creation after creation, within three darknesses. That is Allah, your Lord; to Him belongs dominion. There is no deity except Him, so how are you averted?
Or this:
The Pilgrimage - سورة الحج
[22:5] O People, if you should be in doubt about the Resurrection, then consider that indeed, We created you from dust, then from a sperm-drop, then from a clinging clot, and then from a lump of flesh, formed and unformed - that We may show you. And We settle in the wombs whom We will for a specified term, then We bring you out as a child, and then We develop you that you may reach your time of maturity. And among you is he who is taken in early death, and among you is he who is returned to the most decrepit old age so that he knows, after once having knowledge, nothing. And you see the earth barren, but when We send down upon it rain, it quivers and swells and grows something of every beautiful kind.
Nothing but vague descriptions that do not prove that the Quran is divinely inspired, nor that Allah is real.