Please enable JavaScript.
Coggle requires JavaScript to display documents.
obstetrics_prenatal diagnosis ((trisomy 21 (Down), trisomy 18 (Edwards),…
obstetrics_prenatal diagnosis
chorionic villous sampling
11-14 weeks
similar sensitivity, similar risk of miscarriage 0.5%-1%
karyotype
amniocentesis
16-20 weeks
similar sensitivity, similar risk of miscarriage 0.5%-1%
karyotype
DSS1
first trimester combined Down syndrome screening (1 in 250)
(AFP, HCG, uE3) biochemistry
nuchal translucency
maternal age
()42-84 mm crown-rump length
nasal bone
(anencephaly, omphalocele, limb reduction) gross fetus
NIPT non-invasive prenatal test (safe T21)
non-invasive
x karyotype
trisomy 21
Down
trisomy 18
Edwards
trisomy 13
Patau