title: [Attempt at a definition of a coefficient of risk of chromosome abnormalities at the beginning of pregnancy].
mesh_terms: D000328:Adult; D000649:Amniocentesis; D002869:Chromosome Aberrations / Q000175:diagnosis*; D025063:Chromosome Disorders; D005260:Female; D006801:Humans; D008423:Maternal Age; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular; D018566:Pregnancy, High-Risk; D011276:Pregnanediol / Q000652:urine; D011296:Prenatal Diagnosis; D011446:Prospective Studies; D012306:Risk
chemical_list: D011276:Pregnanediol
vernacular_title: Essai de definition d'un coefficient de risque d'anomalie chromosomique en debut de grossesse.