Refine your search
Availability
-
Authors
-
Topics
- Adult
- Biomarkers
- Chorionic Gonadotropin
- Chorionic Gonadotropin, beta Subunit, Human
- Down Syndrome
- False Positive Reactions
- Female
- Gestational Age
- Humans
- Mass Screening
- Pregnancy
- Pregnancy Trimester, First
- Pregnancy-Associated Plasma Protein-A
- Prenatal Diagnosis
- Ultrasonography, Prenatal
- alpha-Fetoproteins
- analysis
- blood
- diagnosis
- methods
- Show more
- Show less
-
Languages