Development in the Womb: A Conditioned Process
Indaka asks how this body comes to be. The Buddha answers with a concise sequence—kalala → abbuda → pesi → ghana → pasākhā—followed by hair, body hair and nails, and then emphasizes that the developing being is sustained through the mother’s nourishment.
Paṭhamaṁ kalalaṁ hoti … ghanā pasākhā jāyanti.
First there is kalala … from ghana the branches or limbs arise.
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Three Different Ways of Describing Development
The clearest reading keeps the canonical verse, the later Theravāda commentary, and modern developmental biology distinct. They can illuminate one another without being treated as if they were written in the same technical language.
The Buddha gives the concise sequence kalala → abbuda → pesi → ghana → pasākhā, followed by hair, body hair, nails, and maternal nourishment.
The commentary attributed to Buddhaghosa expands the short verse with similes, seven-day stages, limb-bud descriptions, later fetal features, and an account of nourishment.
Modern embryology can be placed beside the traditional terminology for comparison, but the two descriptions arise from different periods, methods, and explanatory frameworks.
The Traditional Developmental Sequence at a Glance
Earliest drop-like stage in the verse; the commentary likens it to a tiny drop of sesame oil or clear ghee.
A later swelling or vesicle-like stage; the commentary describes a change after a further seven days.
A soft flesh-piece or tissue-like mass; the commentary uses the simile of a soft pepper preparation.
A denser mass; the commentary compares its form to a hen’s egg.
Branches or limbs arise; the commentary speaks of five protrusions for head, hands, and feet.
Head-hair, body-hair, and nails arise later in development.
Gradual Formation, Dependence, and the Absence of a Ready-Made Body
The body is described through successive developmental forms rather than as a fully formed body appearing at once.
The verse explicitly states that the developing being is sustained by the food and drink consumed by the mother.
Indaka’s question begins from the distinction between rūpa and a living self or person; the answer shows bodily form developing through conditions.
Other discourses discuss the conditions for conception and the role of viññāṇa, but SN 10.1 does not itself describe consciousness entering the womb. Keeping that distinction clear prevents different teachings from being blended into a single passage.
Indaka’s Question and the Buddha’s Answer
Indaka Asks How the Body Comes to Be
Atha kho indako yakkho yena bhagavā tenupasaṅkami; upasaṅkamitvā bhagavantaṁ gāthāya ajjhabhāsi:
“Rūpaṁ na jīvanti vadanti buddhā,
Kathaṁ nvayaṁ vindatimaṁ sarīraṁ;
Kutassa aṭṭhīyakapiṇḍameti,
Kathaṁ nvayaṁ sajjati gabbharasmin”ti.
Then the yakkha Indaka approached the Blessed One and addressed him in verse:
“The Buddhas say that form is not a living self or person. How, then, does this body come to be? From where does this mass of bones and flesh arise? How is it formed in the womb?”
The Buddha Describes Gradual Development and Maternal Nourishment
“Paṭhamaṁ kalalaṁ hoti,
kalalā hoti abbudaṁ;
Abbudā jāyate pesi,
pesi nibbattatī ghano;
Ghanā pasākhā jāyanti,
kesā lomā nakhāpi ca.
Yañcassa bhuñjatī mātā,
annaṁ pānañca bhojanaṁ;
Tena so tattha yāpeti,
mātukucchigato naro”ti.
“First there is kalala. From kalala comes abbuda. From abbuda arises pesi; from pesi develops ghana. From ghana the branches or limbs arise, and then head-hair, body-hair, and nails.
Whatever food and drink the mother consumes, by that the being within the mother’s womb is sustained.”
How the Later Commentary Expands the Short Verse
The commentary attributed to Buddhaghosa gives a much more detailed developmental picture than the canonical verse: visual similes, seven-day transitions, limb protrusions, later bodily features, and an account of nourishment.
Sāratthappakāsinī Passage
Kalalaṁ hotīti. Yaṁ sandhāya vuttaṁ:—
Tila-telassa yathā bindu, sappi-maṇḍo anāvilo, evaṁ vaṇṇa-paṭibhāgaṁ kalalaṁ sampavuccatīti.
Kalalā hoti abbudanti, tasmā kalalā sattāhaccayena maṁsa-dhovana-udaka-vaṇṇaṁ abbudaṁ nāma hoti. Kalalanti nāmaṁ antaradhāyati.
Vuttaṁ hi cetaṁ:— Sattāhaṁ kalalaṁ hoti paripakkaṁ samūhataṁ, vivaṭṭamānaṁ taṁ bhāvaṁ abbudaṁ nāma jāyatīti.
Abbudā jāyate pesīti, tasmāpi abbudā sattāhaccayena vilīna-tipu-sadisā pesi nāma sañjāyati. Sā marica-phāṇitena dīpetabbā.
Gāma-dārikā hi supakkāni maricāni gahetvā, sāṭakante bhaṇḍikaṁ katvā, pīḷetvā maṇḍaṁ ādāya, kapāle pakkhipitvā, ātape ṭhapenti. Taṁ sukkhamānaṁ sabba-bhāgehi muccati. Evarūpā pesi hoti.
Pesi nibbattati ghanoti, tato pesito sattāhaccayena kukkuṭaṇḍasaṇṭhāno ghano nāma maṁsapiṇḍo nibbattati.
Yathā kukkuṭiyā aṇḍaṁ samantā parimaṇḍalaṁ, evaṁ ghanassa saṇṭhānaṁ nibbattati kammappaccayāti.
Ghanā pasākhā jāyantīti, pañcame sattāhe dvinnam hattha-pādānaṁ sīsassa catthāya pañca piḷakā jāyanti.
Kesā lomā nakhāpi cāti, dvācattālīse sattāhe etāni jāyanti.
Tena so tattha yāpetīti, tassa hi nābhito uṭṭhita-nāḷo mātu-udara-paṭalena ekabaddho hoti. So uppala-daṇḍako viya chiddo. Tena āhāra-raso saṁsaritvā āhāra-samuṭṭhāna-rūpaṁ samuṭṭhāpeti.
The canonical Indakasutta gives the sequence itself but does not assign the first four stages to consecutive seven-day periods, the limb protrusions to a fifth week, or hair and nails to a forty-second week.
A Comparison Is Useful Only When It Does Not Pretend the Terms Are Identical
Modern embryology gives a cellular and anatomical account using fertilization, cleavage, blastocyst formation, implantation, gastrulation, embryonic folding, organogenesis, placental exchange, and fetal development. Those categories do not map exactly onto kalala, abbuda, pesi, ghana, and pasākhā.
The comparison below therefore asks a modest question: is there a broadly similar progression from an extremely early form toward increasing differentiation and visible body structures? It does not claim that an ancient Pāḷi word is the scientific name for a modern embryological stage.
| Traditional Stage | Traditional Description | Modern Embryology — Broad Comparison |
|---|---|---|
| Kalala | Drop-like earliest stage. | During the first week after fertilization, the zygote undergoes cleavage, forms a morula and then a blastocyst, which begins implantation. This is only a broad comparison, not a translation of kalala into a modern technical term. |
| Abbuda | Swelling / vesicle-like or coagulated stage. | During the second week, implantation continues and the embryonic disc is bilaminar. Extraembryonic structures and early placental development are progressing. |
| Pesi | Soft flesh-piece or tissue-like mass. | During the third week, gastrulation forms the three primary germ layers—ectoderm, mesoderm and endoderm—and early body organization becomes more distinct. |
| Ghana | Denser or more solid mass. | During the fourth week, embryonic folding and early organogenesis are well underway; the heart is functioning and limb buds begin to appear toward the end of this period. |
| Pasākhā | Branches / limb protrusions. | Late in week 4 and through weeks 5–6 after fertilization, limb buds become prominent and the head and facial regions change rapidly. |
| Kesā • Lomā • Nakhā | Hair, body hair and nails arise later. | Hair follicles and nails develop much later than the earliest embryonic stages. These features belong to fetal development rather than the first few weeks. |
| Maternal nourishment | The being in the womb is sustained by the mother’s food and drink. | Modern physiology explains fetal nutrition through placental exchange: oxygen and nutrients pass from maternal circulation to the fetus without the maternal and fetal bloodstreams normally mixing directly. |
The three primary germ layers arise during gastrulation in the third week after fertilization, not during the second week. Limb buds begin to appear around the end of the fourth week and become prominent through the following weeks.
What the Developmental Sequence Reveals When Read Carefully
Kalala — The Commentary’s Earliest Stage
The canonical verse simply says, “Paṭhamaṁ kalalaṁ hoti”—first there is kalala. The later commentary supplies the vivid simile of a tiny drop of sesame oil or clear ghee. That simile belongs to the commentary, not to the short canonical verse itself.
It is tempting to translate kalala directly as “zygote,” but that goes beyond what the traditional term itself establishes. The safest comparison is functional: both are being used to speak about a very early phase of development.
Abbuda — A New Form, Not Merely the Same Label
The commentary says that after another seven days the kalala becomes abbuda and that the earlier name disappears. The importance of this wording is not only chronological; it emphasizes transformation. One designation no longer fits because the form has changed.
Modern embryology likewise describes continuous morphological change, but its categories are based on microscopy, cell lineage, implantation, and developmental anatomy rather than these traditional visual similes.
Pesi — The Soft Flesh-Piece
Pesi is described as a softer flesh-piece, with the commentary using a pepper preparation as its simile. The imagery communicates texture and consistency rather than a modern histological diagnosis.
The earlier comparison linked this directly with specific modern tissue layers. That connection should remain broad: the commentary is describing appearance within its own traditional explanatory framework.
Ghana and Pasākhā — Density and the Emergence of Limbs
Ghana means something dense or compact. The commentary compares the form to a hen’s egg and then says that in the fifth week five protrusions appear for the head, hands, and feet.
This is the part of the traditional sequence that most naturally invites comparison with the period in modern embryology when body folding and limb buds become visible. Even here, similarity of sequence should not be mistaken for exact equivalence of terminology or dating.
Maternal Nourishment — The Canonical Verse’s Final Emphasis
The verse ends not with a metaphysical claim but with dependence: whatever food and drink the mother consumes, by that the being within the womb is sustained.
Modern physiology explains this through placental exchange rather than food passing directly from the mother’s stomach to the fetus. The ancient verse and modern physiology use different explanatory languages, but both draw attention to dependence rather than autonomous self-sufficiency.