Chronic hypertension is defined as SBP ≥140 mmHg or DBP ≥90 mmHg that is observable before pregnancy or before the 20th week of gestation. It can be found at the gestational age of >20 weeks or persist in 12 weeks post-partum. The incidence of chronic hypertension is estimated 1-5% of pregnancies depending on age and ethnicity/race. Recent reports reported that the incidence occurs on Afro-American race and it is 1% for other races.