Current Studies

PWAS -- Postpartum Weight and Sleep Study 

This study is funded by the National Institutes of Health (NIH) to examine how body weight, body composition (bone, muscle, and fat), and sleep patterns change in the year after giving birth to an infant among African American and White women.

Why is this study being done?

During pregnancy and postpartum, women’s body weight and body composition change.  How they change may alter their risks for future adverse metabolic results.

Previous work suggests sleep deficiency may affect body weight and body composition.

There are differences in weight retained after giving birth between African American and White women. 

This study will determine how body weight and body composition change after giving birth in African American and White women, and whether sleep is related to these changes.

Study overview:

Over 100 postpartum African American and White women will be recruited.

The initial study visits will take place at 6-8 weeks postpartum.

Follow-up study visits will take place at 4, 6, 9, and 12 postpartum.

Procedures include sleep, weight, and body composition measurements, and completing questionnaires.

Participants will be paid for up to $250 for their participation.

Primary inclusion criteria:

African American or White woman (age ≥ 18 years)

Recently delivered or is expected to deliver a single baby at full-term (≥ 37 weeks of gestation)

Provides care for the newborn infant

No known major diseases, such as diabetes, thyroid disease, sleep apnea, clinical depression

Not using the contraceptive Depo-Provera, i.e. “the shot”


If you are interested in this study, please call 803-777-8291 or email pwas@mailbox.sc.edu.

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