Exact(1)
As specified in that document, issues related to study validity include prospective recruitment of a sufficient sample size of exposed pregnant women (i.e., while still pregnant and before prenatal diagnosis), adequate detail and accuracy in exposure and outcome information, an appropriate comparison group, and minimal lost-to-follow-up.
Similar(58)
In the present study, HIV-positive mothers who had given birth before had higher prenatal intentions for EBF than those who were expecting their first babies.
Mary Ellen Little, a New Jersey nurse with dwarfism, had her first daughter before a prenatal test for achondroplasia was available.
We identified 39,587 children exposed to bereavement during or before their prenatal life.
For Eden cohort, women were asked to collect first morning urine void at home just before the prenatal study visit, between 24 and 30 gestational weeks, using a polypropylene container (FP40VPS, manufactured by CEB, Angers, France).
However, since specific mutations carried by the parents are often identified before the prenatal testing of the fetus, non-invasive methods using digital PCR that focus on specific mutations have also been proposed.
Women with an existing pregnancy who had been exposed to interferon β-1b at any time after the first day of the last menstrual period (LMP), or during pregnancy but before any prenatal screening (eg, ultrasound and amniocentesis), were prospectively enrolled in the registry.
Given the limited experience with CMV IgG avidity testing in clinical settings in the United States, algorithms for CMV counseling and screening, and effective treatment options, would need to be evaluated before routine prenatal screening for primary CMV infection could be recommended.
This information would be of importance in reinforcing the benefits of offering screening at during more than just the prenatal visit before 14 weeks gestation.
Inclusion criteria in both cohorts were white European families presenting for the first prenatal visit before 20 weeks of pregnancy and ultrasound examination demonstrating a structurally normal single foetus.
He does the same for several other notions relating to the question of what's really bad about death, including this one: Why do we regard no longer existing (post-mortem nonexistence) as worse than not having existed before our births (prenatal nonexistence)?
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