[Attempt at a definition of a coefficient of risk of chromosome abnormalities at the beginning of pregnancy]

MeSH terms

• Adult
• Amniocentesis
• Chromosome Aberrations / diagnosis*
• Chromosome Disorders
• Female
• Humans
• Maternal Age
• Pregnancy
• Pregnancy Complications, Cardiovascular
• Pregnancy, High-Risk
• Pregnanediol / urine
• Prenatal Diagnosis*
• Prospective Studies
• Risk