A normal RBC (red blood cell) count in pregnancy varies slightly across trimesters but generally falls within these ranges (expressed as ×106/mm3), based on the provided reference:
| Trimester | Mean (SD) | 5th-95th Percentile Range |
|---|---|---|
| First | 4.30 (0.36) | 3.69 - 4.93 |
| Second | 4.35 (0.36) | 3.69 - 4.93 |
| Third | 4.08 (0.44) | 3.44 - 4.78 |
Therefore, while there is some variation, a general "normal" RBC count range during pregnancy is approximately 3.44 - 4.93 ×106/mm3, though it is best to consult with a healthcare professional for individualized assessment based on specific circumstances. The RBC count tends to decrease slightly in the third trimester compared to the first and second.
