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REFERENCES:
Merck.com: "Contraception."
American Academy of Family Physicians: "Birth Control Options."
MedlinePlus: "Birth Control and Family Planning."
Essure.com: "What Is Essure?"
WebMD Feature: "New Birth Control Options: What's Right for You?"
WebMD Health News: "Stronger Warning for Birth Control Patch."
National Institute of Neurological Disorders and Stroke: "Headache: Hope Through Research."
Lea's Shield.com: "About Lea's Shield."
Depo-Provera.com: "Discover the Answers You Need."
ACOG Patient Education: "Birth Control."