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Endpoints and observation time points in the Amphibian Metamorphosis Assay (AMA)
| Apical endpoints | Daily | Day 7 | Day 21 |
|---|---|---|---|
| Mortality | X | ||
| Developmental stage (NF) | X | X | |
| Hind limb length | X | X | |
| Snout‐vent length | X | X | |
| Body weight (wet) | X | X | |
| Thyroid gland histology | X |
