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How does weight affect how well emergency contraceptives work?

ANSWER

Some emergency contraceptives come in pills. They may not work as well to prevent pregnancy after sex if you are overweight or obese. Talk to your pharmacist or doctor about the best protection for you. If you're overweight, the pill Ella may work better than Plan B One-Step and generic levonorgestrel. In general, the copper-T intrauterine device (IUD) that goes inside your body seems to work better than pills for heavier women.

SOURCES:

American Society for Emergency Contraception: "The Cost of Emergency Contraception: Results from a Nationwide Survey."

Anne Elizabeth Burke, MD, associate professor of gynecology and obstetrics, director of family planning, Johns Hopkins School of Medicine.

Kelly Cleland, MPA, MPH, researcher, Office of Population Research, Princeton University.

FDA: "FDA approves Plan B One-Step emergency contraceptive for use without a prescription for all women of child-bearing potential."

Alexandra Gold, MD, fellow in family planning, Johns Hopkins School of Medicine.

HealthyChildren.org: "Emergency Contraception."

Office of Population Research at Princeton University: The Emergency Contraception Web Site: "Effectiveness," "Safety."

Healthy Canadians web site.

UpToDate.com: "Emergency Contraception." "Intrauterine Contraception."

PlanBOneStep,com.

MyNextChoiceOneDose.com.  

Reviewed by Traci C. Johnson on June 07, 2018

SOURCES:

American Society for Emergency Contraception: "The Cost of Emergency Contraception: Results from a Nationwide Survey."

Anne Elizabeth Burke, MD, associate professor of gynecology and obstetrics, director of family planning, Johns Hopkins School of Medicine.

Kelly Cleland, MPA, MPH, researcher, Office of Population Research, Princeton University.

FDA: "FDA approves Plan B One-Step emergency contraceptive for use without a prescription for all women of child-bearing potential."

Alexandra Gold, MD, fellow in family planning, Johns Hopkins School of Medicine.

HealthyChildren.org: "Emergency Contraception."

Office of Population Research at Princeton University: The Emergency Contraception Web Site: "Effectiveness," "Safety."

Healthy Canadians web site.

UpToDate.com: "Emergency Contraception." "Intrauterine Contraception."

PlanBOneStep,com.

MyNextChoiceOneDose.com.  

Reviewed by Traci C. Johnson on June 07, 2018

NEXT QUESTION:

When should I go back to regular birth control after using an emergency contraception?

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