Cancer[MMHE 2] Chronic hypertension[MMHE 3] Cirrhosis[MMHE 4] Congenital disorders that may be passed on to offspring Heart defects, especially primary pulmonary hypertension and Eisenmenger's syndrome[MMHE 5] Kidney disorders[MMHE 6] Mental health. Depression has been linked to higher rates of preterm delivery.[18] Respiratory disorders and diseases (associated, for example, with placental abruption)[19] Asthma[20][21] Seizure disorders[MMHE 7] Structural abnormalities in the cervix Structural abnormalities in the uterus Viral hepatitis[MMHE 8]