General Consideration Antenatal cardiovascular changes 1. Blood volume increase by 40%0-60% Peaking at 32-34 weeks the expansion in plasma volume is greater than that expansion of red cell mass. 2. Cardiac output Increase by 4096-50 Peaking at 20-24 weeksGeneral Consideration • Antenatal cardiovascular changes 1. Blood volume increase by 40%-60% Peaking at 32 –34 weeks the expansion in plasma volume is greater than that expansion of red cell mass. 2. Cardiac output Increase by 40%-50% Peaking at 20-24 weeks