Williams obstetrics

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Preface:

In this 23rd edition of Williams Obstetrics, we continue to emphasize

the science-based underpinnings and evidence-based

practices of our specialty. Most professional and academic organizations

embrace these principles, and while some promulgate

guidelines and recommendations, others provide funding

for such investigations. Our policy is to cite these whenever possible.

A major impetus for these studies comes from the Eunice

Shriver Kennedy National Institute of Child Health and Human

Development—also called the NICHD. For many decades, this

Institute has supported basic and clinical research to improve

healthcare for women and children. We especially rely on investigations

performed through NICHD-sponsored Maternal-

Fetal Medicine Units and Neonatal Units Networks. There is

also fiscal support for young investigators in obstetrics and allied

specialties that comes from a number of societies and organizations.

Among others, these include the American College

of Obstetricians and Gynecologists, the American Gynecological

and Obstetrical Society, the Society for Maternal-Fetal Medicine,

the Society for Gynecological Investigation, and the

American Board of Obstetrics and Gynecology.