Perinatal outcomes with isolated oligohydramnios at term pregnancy.

Aims: To compare the outcomes of term gestations with oligohydramnios in the absence of other underlying disorders and term gestations with normal amniotic fluid.

Methods: A retrospective analysis of obstetric outcomes in 27,708 term pregnancies. We compared three groups: labor induced because of oligohydramnios, spontaneous onset of labor with normal amniotic fluid, and labor induced because of late term pregnancy with normal amniotic fluid.

Analysis of secondary ultrasound markers in the first trimester before chorionic villus sampling.

Objective: To evaluate detection and false-positive rates of the ultrasound markers-nasal bone (NB), ductus venosus (DV) flow and tricuspid regurgitation (TR)-during the first trimester in a population at high genetic risk, and to study the influence of a two-stage screening policy alter previous combined screening on the rate of invasive procedures.

Methods: A total of 333 chorionic villus samples were obtained in singleton pregnancies. Before biopsy, the ultrasound markers-NB, DV, and TR-were assessed, although the findings were not used to recalculate the previously determined risk for Down syndrome.