Cardiovascular

• HR - Increases
• BP - Lower first half, no change last half
• Blood volume - ≤50% increase
• Hgb and Hct - Decrease
• RBC - ≤30% increase
• WBC - Increases
• Vasodilation - Caused by increased progesterone levels
• Stroke volume - Increases
• CO - Increases
• SVR - Decreases
• Supine position - Decreases perfusion to fetus

Respiratory

• Respiratory rate - Increases
• Oxygen consumption - Increases by 15%
• Tidal volume - Increases
• Functional residual capacity - Decreases
• Dyspnea - Normal at end of third trimester
• pH - Increases
• PaO₂ - Increases
• PaCO₂ - Decreases
• HCO₃ - Decreases

Renal

• Proteinuria - May indicate possible PIH
• GFR - Increases by ≤50%

Metabolic

• Temperature - Slightly increases
• Blood glucose - Increase may indicate gestational diabetes