pre-embryos
Fertilized egg clusters
Pre-embryos are fertilized human eggs in the earliest stages of development, typically before implantation in the uterus—roughly the first fourteen days after conception.
The term emerged in bioethics and reproductive medicine to distinguish this stage from later embryonic development, often in debates over stem cell research, IVF, and the moral status of early human life.
Critics argue the term artificially minimizes what is already an embryo.
Laboratory-aided conception method
- blastocystEarly developmental stage before implantation
- implantationEmbedding into tissue
- fertilizationGamete fusion creating zygote
- zygoteFirst embryonic cell
Tendency to split cleanly
- morulaSolid embryonic cell mass
- blastocystEarly developmental stage before implantation
- trophoblastEmbryonic implantation cells
- mitosisNuclear division producing identical cells
totipotent · pluripotent · differentiation · hatching · compaction · blastomere · grading · fragmentation
Status as a person
- bioethicsMoral philosophy for medicine
- consentVoluntary agreement given
- destructionAct of completely ruining
- donationVoluntary charitable gift
autonomy · rights · regulation · legislation · instrumentalization · commodification · controversy
Able to become many cell types
- CRISPRGene-editing molecular machinery
- in-vitroIn artificial environment
- laboratoryFacility for scientific investigation
- biomedicalConcerning biology and medicine
Gene-bearing nuclear structures
- mosaicismMixed genetic makeup
- biopsyTissue sample for diagnosis
- DNAHereditary code molecule
- karyotypeOrganized chromosome display
mutation · hereditary · sequencing · allele · genotype · trisomy · translocation
IVF
Laboratory-aided conception method
- blastocystEarly developmental stage before implantation
- implantationEmbedding into tissue
- fertilizationGamete fusion creating zygote
zygote · cryopreservation · vitrification · follicles · surrogacy
cleavage
Tendency to split cleanly
- morulaSolid embryonic cell mass
- blastocystEarly developmental stage before implantation
- trophoblastEmbryonic implantation cells
mitosis · totipotent · pluripotent · differentiation · hatching · compaction · blastomere · grading · fragmentation · symmetry
personhood
Status as a person
- bioethicsMoral philosophy for medicine
- consentVoluntary agreement given
- destructionAct of completely ruining
donation · autonomy · rights · regulation · legislation · instrumentalization · commodification · controversy
pluripotent
Able to become many cell types
- CRISPRGene-editing molecular machinery
- in-vitroIn artificial environment
- laboratoryFacility for scientific investigation
chromosomes
Gene-bearing nuclear structures
karyotype · mutation · hereditary · sequencing · allele · genotype · trisomy · translocation
embryo, embryonic, embryos, embryology, embryogenesis, embryonal, embryologist, pre-embryo