egg cell
Enable an AI agent to recognise an egg cell, assess its developmental and physical state, and identify which observations or interventions are appropriate under the applicable biological and governance constraints.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 18 findings · 28 questions
Egg-cell identity Establishes what entity is being called an egg cell and which biological interpretation applies.
Biological identification
Connects identification to organism-specific evidence and terminology.
Identity evidence
Record the basis for identifying this specimen as an egg cell and retain uncertainty in that identification.
- What observations or source records identify this entity as an egg cell rather than another germ cell or a somatic cell? definition
- Which organism and reproductive context support that identification? provenance
Cell and surroundings
Separates the cell from attached structures and reproductive packaging.
Physical referent
Record what belongs to the cell record and what is represented through related structures.
- Does this record identify an individual cell, a cell with associated coverings or cells, or a larger structure incorrectly labelled as the cell? boundary
- Which coverings or associated cells are present, and were any removed during preparation? provenance
Egg-cell maturation Records developmental designation, meiotic evidence and readiness for stage-dependent actions.
Developmental stage
Interprets maturation using the relevant organism's classification.
Stage assignment
Record the assigned stage, the evidence supporting it and any limits of observation.
- Which developmental and meiotic stages are assigned under the selected organism-specific classification? definition
- What observable features or assays support those assignments, and when were they assessed? measurement
Maturation readiness
Separates stage classification from evidence of functional readiness.
Readiness for the next step
Record which maturation requirements a proposed intervention depends on and whether each is established.
- What evidence supports cytoplasmic or other functional maturation beyond the assigned meiotic stage? measurement
- Which maturation prerequisites remain unmet or unknown for the proposed culture, preservation or fertilisation step? action
Egg-cell condition Organises observations of structure, damage, viability and functional potential.
Structural observations
Captures interpretable measurements of the cell and its relevant structures.
Morphology and integrity
Record dimensions and visible condition using explicit measurement boundaries and assessment methods.
- What are the measured cell dimensions, and do those measurements include any coverings? measurement
- What membrane, cytoplasmic or covering abnormalities were observed, using which method and at what time? measurement
Functional assessment
Keeps viability and reproductive competence distinct and evidence-bound.
Competence evidence
Record what each assessment establishes, what it merely predicts and what remains unknown.
- Which observations or assays support viability, and which separately support maturation or fertilisation competence? measurement
- Which proposed actions are justified by that evidence, and which require further assessment? action
Egg-cell handling Tracks identity through collection and manipulation and relates current condition to handling exposures.
Collection and continuity
Maintains the connection between the individual cell, its source and subsequent observations.
Specimen continuity
Record collection and transfers without claiming individual continuity when only a group was tracked.
- From which organism, tissue or source sample was the cell obtained, and by which collection procedure? provenance
- Was this individual tracked continuously, or do any observations apply only to its collection group? boundary
Culture and preservation
Records exposures and interventions relevant to interpreting the current cell state.
Handling-dependent state
Link culture, preservation and manipulation events to applicable protocols and subsequent assessments.
- What media, temperatures, durations, preservation cycles and manipulations are documented for this cell? provenance
- Which protocol and post-handling observations support the next proposed manipulation? action
Egg-cell action and transition Determines permissible next steps and recognises when the entity leaves egg-cell scope.
Intervention eligibility
Connects a proposed use to biological prerequisites and applicable permissions.
Permitted next intervention
Record the decision basis for an intervention through linked protocols and authorisation records.
- What biological prerequisites must be met for the proposed observation, maturation, preservation, fertilisation or other use? action
- Which linked authorisations and use restrictions apply to this cell and the proposed intervention? action
Fertilisation and activation boundary
Separates attempted procedures from observed biological transitions.
Transition evidence
Record fertilisation and activation evidence separately and apply an explicit ownership boundary.
- What observations establish or leave uncertain fertilisation and activation following any attempted procedure? measurement
- Which organism-specific criterion transfers this entity to a fertilised-cell or embryo model, and has that criterion been met? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Which of these kinds and varieties hold for the sense of egg cell this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Which of these identifiers and schemes hold for the sense of egg cell this model covers, and on what evidence? provenance
Standards and regulation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Which of these standards and regulation hold for the sense of egg cell this model covers, and on what evidence? provenance
Real-world use
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Which of these real-world use hold for the sense of egg cell this model covers, and on what evidence? provenance
Typical measurements
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Which of these typical measurements hold for the sense of egg cell this model covers, and on what evidence? provenance
Failure modes and hazards
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Which of these failure modes and hazards hold for the sense of egg cell this model covers, and on what evidence? provenance
Regional variation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Which of these regional variation hold for the sense of egg cell this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of egg cell this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.OBJ
- Other names and narrower kinds
- male egg
What it is Filled
The egg cell (ovum) is the non-motile female gamete of oogamous organisms: a large, cytoplasm-rich germ cell produced by oogenesis that, at the fertilizable stage, fuses with a sperm to form a zygote and supplies the maternal genome, mitochondria and most of the zygote's cytoplasm.
In scope
- Identification of an individual egg cell and its organism of origin
- Oocyte or ovum terminology and developmental stage in the relevant organism
- Cell contents, coverings and associated cells needed to interpret condition
- Evidence about integrity, viability and fertilisation competence
- Collection, culture, storage, preservation and handling history
- Permitted interventions and transition to a fertilised-cell model
Out of scope
- The donor organism's overall reproductive health and clinical care
- Ovarian follicles and reproductive organs as independently managed structures
- Sperm cells and their independent quality assessment
- Zygote and embryo development after the model's fertilisation boundary
- Whole laid eggs, including shell, albumen and other packaging
- Laboratory equipment, treatment plans and consent instruments as independent entities
Why it exists Filled
Enable an AI agent to recognise an egg cell, assess its developmental and physical state, and identify which observations or interventions are appropriate under the applicable biological and governance constraints.
Distinguishing features Filled
- Require evidence identifying the entity as a female germ cell in its organism's reproductive system; shape or size alone does not distinguish it from a somatic cell.
- Distinguish the individual cell from a follicle or cell complex by locating the egg-cell boundary and recording which surrounding structures remain attached.
- Distinguish an egg cell from a whole laid egg by identifying whether the record concerns the cell itself or the larger reproductive package.
- Distinguish maturation stages using organism-appropriate evidence rather than treating every object labelled 'egg' as a mature ovum.
- Distinguish an unfertilised egg cell from a fertilised or activated cell using recorded observations and an explicit transition criterion.
What robots and AI may and may not do Filled
Must not
- Use, transfer or destroy human eggs without the documented consent of the person who provided them.
- Mix up, mislabel or misreport the origin of stored eggs.
- Present fertility outcomes or egg quality as certain when they are not.
- Disclose a person's fertility treatment or donor status without consent.
Only with a human decision
- Any decision to use, donate, store beyond its term or discard human eggs.
- Matching donated eggs with recipients.
May
- Describe egg cells and oogenesis from biology and medical sources.
- Track, label and log stored human eggs in a fertility laboratory under authorized staff instructions.
Moral aspects Filled
- Human eggs are bound up with reproductive autonomy and identity; consent governs every use.
- Egg donation raises concerns about payment, pressure on donors and donor-conceived people's right to know their origins.
Who is affected
- Egg providers and donors
- Intended parents
- Donor-conceived people
Owners Filled
Steward
For human eggs in storage, the licensed clinic acting on the provider's consent; in nature, the organism itself.
Master systems
- Fertility regulator and donor registers
Links to other meta-models Filled
parent
- Q211050 - registry parent class
- Q3246226 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.egg-cell
- Wikidata: Q1321695 (https://www.wikidata.org/wiki/Q1321695)
Direct properties required Filled
- Organism and reproductive context: Linked organism or taxon; reproductive context; identification confidence
- Cell identity and origin: Individual specimen identifier; source organism or sample reference; collection event
- Developmental designation: Organism-specific germ-cell stage; original label; classification scheme; unknown
- Meiotic state: Organism-appropriate stage; observation method; assessment time; indeterminate
- Cell dimensions: Micrometres or millimetres; measured axes; inclusion or exclusion of coverings
- Coverings and associated cells: Organism-specific structures; present, absent, removed, disrupted or unassessed
- Integrity and morphology: Recorded membrane, cytoplasmic and covering observations; assessment method and time
- Viability and functional competence: Separate viability, maturation and fertilisation assessments; supporting evidence; uncertainty
- Preservation state: Fresh, cultured, cryopreserved, warmed, fixed or other documented state
- Fertilisation and activation status: No evidence observed, suspected, confirmed or indeterminate; fertilisation and activation assessed separately
Recognition required Filled
- Under a microscope, a single large round cell surrounded by a clear outer coat.
- In birds and reptiles, the yolk of an egg is the enlarged egg cell.
Capabilities and actions required Filled
- Identify and track an individual egg cell while preserving its source and handling links.
- Observe and measure organism-specific maturation and condition indicators.
- Assess readiness for a proposed intervention against explicit evidence and prerequisites.
- Select an applicable protocol for collection, culture, maturation or preservation when authorised.
- Record authorised fertilisation or activation attempts and evaluate their observed outcomes.
- Transfer ownership to a fertilised-cell or embryo model when the declared boundary is met.
Hazards and failure modes required Filled
- Mislabelling or mix-ups in fertility clinics cause irreversible harm to families.
- Storage failure can destroy eggs that cannot be replaced.
Standards and interfaces required Filled
- Human Fertilisation and Embryology Act 1990, Parliament of the United Kingdom.
- Directive 2004/23/EC on standards for human tissues and cells, European Parliament and Council.
Context of use required Filled
- Egg cells occur in the reproductive systems or reproductive structures of organisms that reproduce through oogamy.
- They are studied in developmental biology, reproductive research, breeding and fertility care to understand fertilization and early development.
- Assessment depends on the species, maturation stage and whether the cell remains in its natural setting or has been collected.
Sources Filled
- Eggs (Molecular Biology of the Cell, 4th ed., Ch. 20) - Oocyte-to-ovum stages, meiotic arrests, polar bodies, and species differences in when meiosis completes.
- Unscrambling the oocyte and the egg: clarifying terminology of the female gamete in mammals - Functional distinction of mammalian oocyte (prophase I, ovary) from egg (MII, oviduct, fertilizable).
- Ovum (Egg Cell): Structure, Function & Fertilization - Human ovum as female gamete; ovulation, fertilization to zygote, or breakdown if unfertilized; haploid 23 chromosomes.
- Egg cell - Non-motile female gamete in anisogamy/oogamy; oosphere in some plants and fungi; mammalian ovum size and discovery history.
- egg cell (Q1321695) - Identifiers: Cell Ontology CL_0000025, FMA 67343, ICD-11 XA95A3, and distinction from oocyte.
- The Istanbul consensus update: a revised ESHRE/ALPHA consensus on oocyte and embryo static and dynamic morphological assessment - ART morphology criteria; small, large and giant oocyte size cut-offs; exclusion of giant oocytes; polar-body and zona findings.
- Safe human tissues & cells for transplantation (until 2027) - summary of Directive 2004/23/EC - EU quality and safety law covering donation and processing of ova; replacement by Regulation (EU) 2024/1938 from 6 August 2027.
- Egg Transport and Fertilization (Volume 5, Chapter 46) - Human oocyte fertilizable lifespan of about 12-24 hours; zona pellucida as species-selective barrier and block to polyspermy.
Open questions
- Does the registry intend 'egg cell' to cover immature oocytes and plant egg cells as well as mature animal ova, and how should that breadth be expressed without splitting the entry?
- Which organism-specific maturation classifications and observable indicators should be supported as authoritative extensions?
- Which viability and competence assessments are sufficiently validated for each intended use, and which alter or consume the cell being assessed?
- What exact ownership boundary should apply to fertilisation, activation without fertilisation and indeterminate transition states?
- Which existing Vercy models already own this concept or its neighbouring structures, and which protocol and authorisation models should be linked?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1321695/spec.json