REN and obesity due to melanocortin 4 receptor deficiency: The mechanisms involved in the pathogenesis of obesity‐related HPT in pregnancy are caused by physiological changes in adiposity, increased blood circulation, sympathetic nervous system overactivation, stimulation of the renin‐angiotensin‐aldosterone system, alterations in adipose‐derived cytokines, insulin resistance, and structural as well as functional renal changes.44