Applied to a population with maternal ages similar to the entire US population delivering liveborn infants
, the Down syndrome detection rate and false-positive rate for laboratory 1 were expected to be 82.
The subjects for the current study were identified in a retrospective review of placental pathologic conditions in liveborn infants
with IUGR, which was described in our previous report.
rate of antenatal ART take-up;  (iii) proportions of women who were receiving lifelong ART by delivery (initiated either before or during pregnancy);  (iv) proportions of women presenting for the first time when in labour (unbooked);  (v) proportions of liveborn infants
with available first HIV DNA PCR test results at ~6 weeks of age (uptake of early infant diagnosis of HIV (EID));  and (vi) proportions of positive PCR tests (vertical HIV transmission at 6 weeks).
A prospective cohort study was done among 681 HIV positive pregnant women in the Latin American and Caribbean region receiving one of three different antiretroviral regimens for at least 28 days during pregnancy and who delivered liveborn infants
with known birthweight and gestational age in 2005.