Table 1: Normal Hemodynamic Changes During Pregnancy

Table 1:
Normal Hemodynamic Changes During Pregnancy
Hemodynamic Parameter	Change During Normal Pregnancy	Change During Labor and Delivery	Change During Postpartum
Blood volume	↑ 40-50%	↑	↓
Heart rate	↑ 10-15 beats per minute	↑	↓
Cardiac output	↑ 30-50% above baseline	↑ additional 50%	↑ initially with ↑ in preload, then ↓ with diuresis
Blood pressure	↓ 10 mm Hg	↑	Returns to baseline
Stroke volume	↑ 1^st and 2^nd trimester; slight ↓ 3^rd trimester	↑ (300-500 cc per contraction)	↓
Systemic vascular resistance	↓	↑	Returns to baseline