Kidney and Pregnancy Registry

Maternal physiological adaptation to pregnancy plays an important role in the smooth progress of the pregnancy and the healthy growth of the fetus. This physiological adaptation takes place at the level of several organs, including the kidney. Physiological changes during a normal pregnancy take place at the anatomical, glomerular and tubular level. In the event of pre-existing kidney damage (glomerular and tubular diseases, stone disease, high blood pressure (hypertension) etc...) these adaptations will not be optimal. This will have implications for: * the course of the pregnancy with the occurrence of feto-maternal complications: miscarriages, pre-eclampsia, intrauterine growth retardation (IUGR), low birth weight, prematurity. The risk of feto-maternal complications increases with the degree of renal failure or with certain pathologies such as lupus. * progression of kidney disease Some maternal complications have long-term implications: preeclampsia is associated with a high risk of subsequent cardiovascular and renal complications. Pregnancies in these patients are high-risk pregnancies and require specialized management by an experienced group of gynecologists and nephrologists. The creation of a retrospective and prospective register by collecting demographic, clinical, biological, radiological and genetic data concerning patients at each consultation within the CHU Brugmann Hospital will allow: * to establish the epidemiological and clinico-biological characteristics of the patients followed at the Kidney and Pregnancy Clinic at the CHU Brugmann Hospital * to analyze the risk factors for feto-maternal complications * to analyze the risk factors for the occurrence of subsequent cardio-renal pathologies in patients who have had preeclampsia or an event during their pregnancy * to identify patients who will need specialized genetic testing