Establishing Three Blastocyst Lineages--Then What?
Bibliographic record
Abstract
Development of the mouse embryo to the blastocyst stage occurs over 3 to 4 days following fertilization of the oocyte. During this time, several molecular and morphological events take place that result in the formation of three distinct cell lineages: the trophectoderm, the epiblast, and the primitive endoderm. Many studies have investigated the processes that control lineage specification in the blastocyst including gene expression, cell signaling, cell-cell contact/positional relationships, and most recently, epigenetics. Here we review, at the molecular level, recent contributions to our understanding of the mechanisms that play a role in formation of these lineages. Additionally, we focus on the next steps in differentiation to highlight processes important in the development of those lineages that contribute to the extraembryonic tissues. In this context, we discuss the establishment of extraembryonic ectoderm and the contributions of parietal and visceral endoderm to yolk sac formation.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".