Publications by authors named "Shayna M Norman"
Objective: To estimate the effects of obesity on the duration and progression of the first stage of labor in a predominantly obese population and estimate the dose-effect with increasing classes of obesity.
Methods: We performed a retrospective cohort study of labor progression among 5,204 consecutive parturients with singleton term pregnancies (37 weeks of gestation or more) and vertex presentation who completed the first stage of labor. Two comparison groups were defined by body mass index (BMI) less than 30 (n=2,413) or 30 or more (n=2,791).
Objective: To estimate the association between neural tube defects (NTDs) and low birth weight.
Study Design: This was a retrospective cohort study of women undergoing ultrasound from 17 to 22 weeks from 1990 to 2008. Presence or absence of fetal NTD defined the two study groups.
Objective: To estimate the association between subchorionic hematoma and adverse perinatal outcomes.
Data Sources: MEDLINE, EMBASE, and the Cochrane Library.
Methods Of Study Selection: We searched English language publications from January 1981 to August 2010 for cohort and case-control studies evaluating subchorionic hematoma and perinatal outcomes.
Objective: To estimate the association between the ultrasonographic diagnosis of subchorionic hemorrhage and adverse pregnancy outcomes.
Methods: This was a retrospective cohort study of all consecutive women undergoing routine ultrasonography before 22 weeks with a singleton gestation at one institution from 1994 to 2008. Presence or absence of subchorionic hemorrhage defined the two study groups.