Template:Prenatal Diagnosis terms: Difference between revisions

Revision as of 18:58, 24 May 2010

Prenatal Diagnosis Terms

false negative rate - The proportion of pregnancies that will test negative given that the congenital anomaly is present.

false positive rate - The proportion of pregnancies that will test positive given that the congenital anomaly is absent.

negative predictive value - The probability that a congenital anomaly is absent given that the prenatal screening test is negative.

positive predictive value - The probability that a congenital anomaly is present given that the prenatal screening test is positive.

pre-implantation genetic diagnosis - (PGD) a screening procedure for embryos produced through in vitro fertilisation (IVF) for genetic diseases that would generate developmental abnormalities or serious postnatal diseases.

prenatal screening sensitivity - (detection rate) The probability of testing positive on a prenatal screening test if the congenital anomaly is present.

prenatal screening specificity - The probability of testing negative on a prenatal screening test if the congenital anomaly is absent.

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 '''prenatal screening specificity''' - The probability of testing negative on a prenatal screening test if the congenital anomaly is absent.
-==Terms==
-'''Femur length''' - (FL) is used to determine fetal age and normal development (small/large/abnormal) parameters. The femur is the longest bone in the body and measurements and reflects the longitudinal growth of the [[F#fetus|fetus]] (approximately 14 weeks 1.5 cm - term 7.8 cm). It is one of the four typical [[U#ultrasound|ultrasound]] assessments of fetal size and age: [[B#biparietal_diameter|Biparietal Diameter]] (BPD), [[H#head_circumference|Head Circumference]] (HC), [[A#abdominal_circumference|Abdominal Circumference]] (AC), and Femur Length (FL).