16 May 2019 High blood pressure occurs in about 15% of pregnancies and is responsible for significant maternal and foetal morbidity. The factors responsible for high blood pressure in pregnancy include: An increasing incidence of obesity; The fact that women often become pregnant at more advanced ages. Pregnant women should be monitored during pregnancy and post-partum if: They have chronic high blood pressure; They have high blood pressure that occurs only in pregnancy. They are monitored to prevent, detect and treat any risk factors and complications. This article was written with the support of physicians and other clinical professionals from the Hospital da Luz network. The content published in the Health Guide is intended for the general public and is provided for informational and educational purposes only. It does not replace individual medical assessment, diagnosis, or personalized clinical advice from a qualified healthcare professional. The content is produced or reviewed by physicians and other healthcare professionals at Hospital da Luz and is based on the knowledge available at the time of publication or the most recent update, as indicated at the beginning of each item.