Keyphrases
Pregnancy Trimester
100%
Pregnancy-associated Plasma protein-A (PAPP-A)
100%
Repeated Sampling
100%
Human Chorionic Gonadotropin
100%
Autocorrelation
100%
First Trimester
22%
Biochemical Markers
22%
Paired Samples
22%
Trisomy 21
11%
High Correlation
11%
Performance Improvement
11%
Risk Assessment
11%
Gestational Age
11%
Early Gestational Age
11%
Screening Test
11%
Correlation Coefficient
11%
Singleton Pregnancy
11%
Mathematics
Repeated Sampling
100%
Autocorrelation
100%
Trimester
100%
Crosscorrelation
100%
Gestational Age
40%
Paired Sample
40%
correlation coefficient ρ
20%
Prospective Study
20%
Biochemistry, Genetics and Molecular Biology
Pregnancy-Associated Plasma Protein A
100%
Human Chorionic Gonadotropin
100%
First Trimester Pregnancy
100%
Trisomy 21
22%
Screening Test
11%
Prospective Study
11%
Earth and Planetary Sciences
Autocorrelation
100%
Cross Correlation
100%
Correlation Coefficient
50%
Immunology and Microbiology
Blood Plasma
100%
First Trimester Pregnancy
100%
Screening Test
11%