Looking beyond sleep duration in understanding obesity risk in adolescents: the role of circadian timing and misalignment on adolescent dietary outcomes, physical activity, and body mass index.

Study Objectives: This study evaluated the differences in obesity-related outcomes across multiple adolescent sleep health domains, including circadian misalignment (CM), circadian timing, and sleep duration.

Methods: 53 adolescents (aged 14-18; body mass index [BMI] percentile < 95%; 53.7% female) completed a cross-sectional study that included baseline assessment of height; weight; demographics; and 10 days assessment of sleep, physical activity, and dietary outcomes.

Growth restriction: identifying fetuses at risk.

Purpose: Examine risks of intrauterine growth restriction (IUGR) and composite perinatal outcomes with estimated fetal weights (EFW) 10-20th%, and compare outcomes using umbilical artery Doppler (UAD).

Materials And Methods: Retrospective, cohort evaluating ultrasound (US) EFW 10-20th%, between 2002 and 2012. Cases were identified with EFW % 10-20.

Outcomes With Cerclage Alone Compared With Cerclage Plus 17α-Hydroxyprogesterone Caproate.

Objective: To examine the differences in perinatal outcomes among women with a prior preterm birth who received cerclage compared with cerclage plus 17α-hydroxyprogesterone caproate.

Methods: Women with transvaginal cerclage placement and a prior delivery between 16 and 36 weeks of gestation were identified over a 10-year period (July 2002 to May 2012) in this retrospective cohort study. Exclusion criteria were delivery at another institution, abdominal cerclage, multiple gestations, and major fetal anomalies.

Does increase in birth weight change the normal labor curve?

Objective: This study is designed to assess the effect of birth weight on the duration of labor.

Study Design: Retrospective review of the electronic database created by the Consortium on Safe Labor, reflecting labor and delivery information from 12 clinical centers from 2002 to 2008. Population included all laboring women in the 19 participating hospitals, excluding those with malpresentation, fetal anomalies, elective repeat cesarean, multiple gestations, gestational age less than 34 weeks, and delivery with less than two cervical examinations.

The effects of labor and delivery on maternal and neonatal outcomes in term twins: a retrospective cohort study.

Objective: To compare maternal and neonatal outcomes in twins undergoing a trial of labor versus pre-labor caesarean.

Design: Retrospective cohort study.

Setting: 19 US hospitals from the Consortium on Safe Labor.