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If a screening test shows that you have a higher chance of having a baby with Down's, Edwards' or Patau's syndromes, you will be offered diagnostic tests to find out for certain if your baby has the condition.Inside the cells of our bodies there are tiny structures called chromosomes.A common association is subchorionic hemorrhage which is associated with increased risk for miscarriage, preterm delivery, preterm premature rupture of membranes, stillbirth, and placental abruption.Several studies have attempted to characterize subchorionic hemorrhage by conventional two-dimensional ultrasound which is not particularly well-suited for accurate measurement of small irregular hematomas.Chromosomes carry the genes that determine how we develop. Problems can occur when sperm or egg cells are produced, which can lead to a baby having an extra chromosome. In Down's syndrome, there is an extra copy of chromosome 21 in each cell.A baby born with Down's syndrome will have a learning disability.
This definition is based primarily on outcomes research more than two decades old that demonstrated that pregnancies progressing beyond 42 weeks gestation had higher rates of morbidity and mortality.
In the OBUS12 group, the rate of postterm pregnancy ≥42 weeks was lower (2.7%) as compared to the OBUS13–24 group (3.7%, p=0.022).
With regards to reaching 41 weeks of gestation, the OBUS12 group was again lower (18.2%) as compared to the OBUS13–24 group (22.1%, p Our findings suggest that earlier obstetric ultrasound, which leads to better pregnancy dating, reduces the rate of estimated postterm pregnancies.
The primary outcome measures were the rates of postterm pregnancies greater than 41 or 42 weeks’ gestation.
Secondary outcomes were the differences between the postterm and term gestations in maternal and neonatal outcomes.
The accuracy of h CG measurement in determining the week since conception was more than 93%.