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Birth Control and Blood Clotting Study

We know that birth control can slightly increase risk of blood clots in women. We also know that women with sickle cell disease are at increased risk of blood clots in general. We are looking for women with and without sickle cell disease who are not on birth control to take part in this study to help us learn more about markers of blood clotting.

Age & Gender

  • 15 years ~ 55 years
  • Female

Visit Availability

  • Standard business hours (M-F, 8-5)
  • Extended hours (M-F, early morning or evening)
  • Weekend hours, if needed
  • Visits can be combined with regular clinical appointments


North Carolina (Statewide)

What will be asked of you

At the first visit, we will coordinate with your primary care or gynecology provider to meet you in clinic. We will have you fill out a survey and draw 1 blood sample. 3 months later, we will have you visit the lab for another blood draw and another survey.


$20 visa gift card

In-person visits:
Total length of participation:
3 months, 2 visits

Looking for Healthy Volunteers

Requirements for healthy volunteers are different than for those with a specific condition. If you are interested in becoming a healthy volunteer for this study, use the below categories to determine if you are able to participate.

Able to participate:

  • you are not on birth control, but are considering starting
  • you are African American

Not eligible if:

  • you are pregnant
  • you are already on birth control

Contact the Team

Visit Location

Contact & Visit Location

Primary Contact

Primary Visit Location

Mary Ellen Jones Building (UNC-Chapel Hill)
116 Manning Dr, Chapel Hill, NC 27599, USA

Secondary Visit Location

UNC Center for Rehabilitation Care
1807 Fordham Blvd, Chapel Hill, NC 27514, USA

Additional Study Information

Principal Investigator

Erica Sparkenbaugh

Study Type

Clinical or Medical

Study Topics

Blood Conditions
Healthy Volunteer or General Population
Sexual and/or Reproductive Health
Women's Health

IRB Number


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