Hypertension-related disorders are the most common medical problems encountered during pregnancy and complicating approximately 6-11% of all pregnancies [1-3]. Hypertensive disorders during pregnancy are commonly classified into four categories: a) chronic hypertension, b) preeclampsiaeclampsia, c) preeclampsia superimposed on chronic hypertension and d) gestational hypertension (transient hypertension of pregnancy, or chronic hypertension identified in the latter half of pregnancy). In particular, gestational hypertension is actually preferred over the older term of pregnancy-induced hypertension . In 2008, the Society of Obstetricians and Gynecologists of Canada (SOGC) released revised guidelines  that simplified the classification of hypertension in pregnancy into 2 categories, ‘preexisting’ and ‘gestational’ with the option to add “with preeclampsia” to either category in the presence of additional maternal or fetal symptoms or signs. The category “hypertensive disorders of pregnancy” is an important cause of perinatal morbidity and mortality [1-3] contributing to stillbirths and fetal complications including abruptio placentae, intrauterine growth restriction, premature delivery, and intrauterine fetal death . In addition, they rank among the leading causes of maternal mortality, particularly when elevated blood pressure (BP) is due to preeclampsia, either alone or superimposed on chronic vascular disease .