| ACVR2B | activin receptor type 2B |
| C42del | cysteine 42 deletion |
| CSA | cross-sectional area |
| MSTN | myostatin |
| gRNA | guide RNA |
| PAM | protospacer adjacent motif |
| PCR | polymerase chain reaction |
| PGC | primordial germ cell |
| PM | pectoralis major |
| SEM | standard error of the mean |
| TGF-β | transforming growth factor-β |
| WT | wild-type |
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