Embryonic development: a precise description

EMB-01 Surah Al-Mu'minun Verse 12-14 2026-09-26 17:11:45

Quranic verses

وَلَقَدْ خَلَقْنَا الْإِنسَانَ مِن سُلَالَةٍ مِّن طِينٍ. ثُمَّ جَعَلْنَاهُ نُطْفَةً فِي قَرَارٍ مَّكِينٍ. ثُمَّ خَلَقْنَا النُّطْفَةَ عَلَقَةً فَخَلَقْنَا الْعَلَقَةَ مُضْغَةً فَخَلَقْنَا الْمُضْغَةَ عِظَامًا فَكَسَوْنَا الْعِظَامَ لَحْمًا

And certainly did We create man from an extract of clay. Then We placed him as a drop of fluid in a safe lodging. Then We made the drop into a clinging clot, and We made the clot into a lump, and We made the lump into bones, and We covered the bones with flesh.

Surah Al-Mu'minun (23:12-14)

Hadiths (Sunnah)

إِنَّ أَحَدَكُمْ يُجْمَعُ خَلْقُهُ فِي بَطْنِ أُمِّهِ أَرْبَعِينَ يَوْمًا نُطْفَةً، ثُمَّ يَكُونُ عَلَقَةً مِثْلَ ذَلِكَ، ثُمَّ يَكُونُ مُضْغَةً مِثْلَ ذَلِكَ، ثُمَّ يُرْسَلُ إِلَيْهِ الْمَلَكُ فَيَنْفُخُ فِيهِ الرُّوحَ

« Each of you is gathered in his mother's womb for forty days as a drop of sperm, then he becomes a clinging clot (alaqa) for a similar period, then a lump of flesh (mudgha) for a similar period, then the angel is sent to him and breathes the soul into him. »

Narrated by Abdullah ibn Mas'ud — Sahih al-Bukhari n°3208 [Sahih]

إِذَا مَرَّ بِالنُّطْفَةِ اثْنَتَانِ وَأَرْبَعُونَ لَيْلَةً بَعَثَ اللَّهُ إِلَيْهَا مَلَكًا فَصَوَّرَهَا وَخَلَقَ سَمْعَهَا وَبَصَرَهَا وَجِلْدَهَا وَلَحْمَهَا وَعِظَامَهَا

« When forty-two nights pass over the drop of sperm, Allah sends an angel to it who shapes it and creates its hearing, its sight, its skin, its flesh and its bones. »

Narrated by Hudhayfah ibn al-Yaman — Sahih Muslim n°2645 [Sahih]

In Surah Al-Mu'minun (23:12-14), the Quran describes the stages of human embryonic development with remarkable precision:

"We created man from an extract of clay. Then We made him a drop of sperm in a secure resting place. Then We made the drop into an adhesion; and from the adhesion We created an embryo; then from the embryo We created bones, and We clothed the bones with flesh."

This multi-stage description — drop of sperm (nutfah), adhesion (alaqah), embryo (mudghah), formation of bones then clothing with flesh — corresponds strikingly to the stages of embryonic development described by modern embryology.

Professor Keith Moore, a world-renowned embryologist at the University of Toronto, highlighted that Quranic descriptions of embryonic development present striking correspondences with modern embryological knowledge. He notably observed that the term "alaqah" evokes the appearance of the embryo at this stage, which may call to mind a leech attached to the uterine wall.

Detractors' arguments

This convergence, though frequently cited, calls for several reservations worth knowing in order to preempt criticism:

Correspondence of terms debated: the equivalence between the Arabic terms (nutfah, alaqah, mudghah) and modern embryological stages is disputed. Some embryologists and exegetes consider that these terms describe more general realities and do not correspond exactly to contemporary scientific nomenclature.
Polysemy of the term "alaqah": this term can mean "leech", "adhesion" or "clinging clot". Its interpretation as "leech" is only one of several possible readings, and the embryo at this stage does not literally resemble a leech.
Chronology of the hadiths: the hadiths mentioning periods of 40 days (or 42 nights) for each stage do not correspond exactly to the durations established by modern embryology, which are shorter.
Keith Moore's statements nuanced: some claims attributed to Keith Moore have been simplified or exaggerated in apologetic literature. His remarks, though positive, were more nuanced than is sometimes reported.

Scientific findings

The "nutfah" (drop) stage is related to fertilization and the first days of development
The "alaqah" (adhesion) stage is related to embryo implantation in the uterus (days 7-24)
The "mudghah" (lump) stage is related to the embryo's appearance between 24 and 40 days
The mention of bone formation before flesh is related to the chronology of embryonic ossification

Scientific references

[1] The Developing Human: Clinically Oriented Embryology — Keith L. Moore (Elsevier, 2019)
[2] La Bible, le Coran et la Science — Maurice Bucaille (Seghers, 1976)

The numbers in brackets in the text refer to this list.