| ED | Embryonic Day |
| YS | Yolk Sac |
| P | Probiotic group |
| C | Control group |
| MALT | Mucosal-Associated Lymphoid Tissue |
| GALT | Gut-Associated Lymphoid Tissue |
| MHC | Major Histocompatibility Complex |
| EMPs | Erythro-myeloid Progenitor Cells |
| CFU | Colony Forming Unit |
| BSA-PVP-TBS | 1% bovine serum albumin, 1% polyvinylpyrrolidone, 1% tris-buffered saline |
| Iba1 | Ionized calcium-binding protein molecule 1 |
| iNOS | inducible nitric oxide synthase |