purpose of prenatal screening
define the risk of a genetic disease in a low-risk population
assess the risk that a child will have a genetic disease
screening test
given if a screening test is positive, to assess whether the disease is present or absent
diagnostic test
when can nuchal translucency be seen?
10-14 weeks
what can be used to detect Down syndrome in 1st trimester
how early can chorionic villus sampling be done?
as early as 10 weeks
which method of testing for down syndrome results in best sensitivity?
integrated screening
most important initial step in identifying a woman at risk for hereditary cancer
family history
BRCA 1/2 is assc’d with which cancers?
2. ovarian cancer