This entry considers the phrase 'three darknesses' (thalath zulumat) in Surah az-Zumar 39:6, and the modern reading that identifies these with anatomical layers enveloping the fetus. The case here is weak: it rests on a disputed reading that classical commentators did not share.
The source text
خَلَقَكُم مِّن نَّفْسٍ وَٰحِدَةٍ ثُمَّ جَعَلَ مِنْهَا زَوْجَهَا وَأَنزَلَ لَكُم مِّنَ ٱلْأَنْعَـٰمِ ثَمَـٰنِيَةَ أَزْوَٰجٍ ۚ يَخْلُقُكُمْ فِى بُطُونِ أُمَّهَـٰتِكُمْ خَلْقًا مِّنۢ بَعْدِ خَلْقٍ فِى ظُلُمَـٰتٍ ثَلَـٰثٍ ۚ ذَٰلِكُمُ ٱللَّهُ رَبُّكُمْ لَهُ ٱلْمُلْكُ ۖ لَآ إِلَـٰهَ إِلَّا هُوَ ۖ فَأَنَّىٰ تُصْرَفُونَ
“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?”
Qur'an 39:6 · Saheeh International
What was understood in the seventh century
The interior of the pregnant womb was inaccessible to ordinary observation in the seventh century. Its internal anatomical layers, and the membranes surrounding the fetus, could not be seen or dissected in common experience, so any triad of coverings was not a matter of settled knowledge. What was evident was only that the developing child lay hidden and in darkness.
Classical tafsir typically read the 'three darknesses' non-anatomically, for example as the darkness of the womb, the darkness of the belly, and the darkness of the night, or as similar triads that made no claim about tissue layers. The verse's own emphasis is theological. It moves from 'He creates you in the wombs of your mothers, creation after creation' to the declaration that this is God, the Lord to whom dominion belongs, so the phrase functions within an argument for divine power rather than as a description of anatomy.
The modern correspondence
Modern commentators have proposed that the three darknesses are three protective layers that envelop the developing fetus. In the reading popularized by the embryologist Keith Moore in The Developing Human, these are the anterior abdominal wall, the uterine wall, and the amniotic and chorionic membranes surrounding the child — three successive coverings, each enclosing the next. An alternative scheme names the amnion, chorion, and decidua instead. These structures were described in detail only with the rise of modern anatomy and obstetrics, well after the classical period of exegesis.
The correspondence argued here is that a phrase given in the seventh century maps onto a layered enclosure confirmed much later, and that 'creation after creation, within three darknesses' can be read as development proceeding inside three nested coverings. The Britannica material on fetal membranes, cited below, sets out the membranes on which one version of this reading draws, though the verse itself names no specific tissue.
Considerations and counterpoints
The identification rests on a disputed reading. Classical exegetes generally understood the 'three darknesses' as non-anatomical, so the three-layers interpretation is a later overlay rather than a received meaning. Critics add several specific objections: that the number three can be mapped onto more than one anatomical scheme, and that this flexibility is itself the problem, since a phrase fitting several triads equally well is too pliable to count as a precise disclosure; that the body in fact contains many more layers than three (endometrium, myometrium, perimetrium, peritoneum, and the fetal membranes), so selecting exactly three is a choice made to fit the verse; that the amnion and chorion are thin and translucent rather than genuinely 'dark'; and that the same idea of three membranes around the fetus was already taught by the Greek physician Galen, whose embryology circulated in the late-antique world. On this view the reading selects an anatomy to match after the fact, which is closer to retrofitting than to prediction.
Credibility rating: Tier 3 · Contested — The identification of exactly which 'three' layers is interpretation-dependent, and classical exegetes read the darknesses non-anatomically.