| GEE | Generalized Estimating Equations |
| 25(OH)D | 25-Hydroxyvitamin D |
| HCG | Human Chorionic Gonadotropin |
| EAGeR | Effects of Aspirin in Gestation and Reproduction |
| LBW | Low Birth Weight |
| DAG | Directed Acyclic Graphs |
| OR | Odds Ratio |
| aOR | Adjusted Odds Ratio |
| BMI | Body Mass Index |
| LDA | Low-Dose Aspirin |
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