Are you just trolling us op? There's many layers to the human body. Cherry picking 3 and playing with the definition of a layer is easy for a miracle claimer. You could also pick out 4, 5, 6 etc. layers and justify them.
For example just take this justification from tafsir-al-jalalayn
http://www.altafsir.com/Tafasir.asp?tMadhNo=0&tTafsirNo=74&tSoraNo=39&tAyahNo=6&tDisplay=yes&UserProfile=0&LanguageId=2He created you from a single soul, namely, Adam, then made from it its mate, Eve; and He sent down for you of the cattle, [of] camels, cows, small cattle, sheep and goats, eight kinds, of each kind a male and a female — as He makes clear in sūrat al-An‘ām [Q. 6:143f.]. He creates you in your mothers’ wombs, creation after creation, that is to say, as a sperm-drop, then a blood clot, then a foetus, in a threefold darkness, that is,
the darkness of the belly, that of the womb and that of the placenta. That is God, your Lord. To Him belongs [all] sovereignty. There is no god except Him. Why then are you being turned away?, from worshipping Him to worshipping [things] other than Him?
Something so unspecific as 'three veils of darkness' can have any number of meanings. Interpolation /=/ miracle.