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BIRTH CONTROL FAILURE AND OBESITY
Being overweight -- in addition to other risks, does it make the birth control pills fail? This is Dr. Steven Andrew Davis, Speaking of Health. A report published in the journal, Obstetrics and Gynecology, took a long-term look at those times when birth control pills fail to work. It points out that some ten million or more American women rely on oral contraceptives as their primary means of preventing pregnancy, and yet this group of women experiences more than half-a-million unintended pregnancies each year. This research team wanted to know why?
It looked at a host of variables in these women, such as their age, whether they smoked, how many pregnancies and children they had. They even looked at data on race, type of birth control pill, and how reliably they took their medications. But none of these factors seemed to predict a greater risk for failure of the "pill". The main confounding factor, it turns out, was weight. Women weighing 155 pounds or more had a 60 percent increased risk of oral contraception failure. And the women at highest risk in this overweight group were those taking birth control pills with smaller doses of estrogen.
Overall, the "pill" has been an effective and safe way to prevent pregnancy. But women, especially those who are overweight, might check with their physician to see if the pill they're on right now is still all they need. For a copy of this script and the journal reference, access our web site, speakingofhealth.com. Speaking of Health, I'm Dr. Steven Andrew Davis for CBS News.
Ref: Holt, VL, et al. Body weight and risk of oral contraceptive failure. Obstet Gynecol
May 2002; 99:820-7. Reviewed by Walling AD, in American Family Physician, Sept 1, 2002; 66:854-5
Being overweight -- in addition to other risks, does it make the birth control pills fail? This is Dr. Steven Andrew Davis, Speaking of Health. A report published in the journal, Obstetrics and Gynecology, took a long-term look at those times when birth control pills fail to work. It points out that some ten million or more American women rely on oral contraceptives as their primary means of preventing pregnancy, and yet this group of women experiences more than half-a-million unintended pregnancies each year. This research team wanted to know why?
It looked at a host of variables in these women, such as their age, whether they smoked, how many pregnancies and children they had. They even looked at data on race, type of birth control pill, and how reliably they took their medications. But none of these factors seemed to predict a greater risk for failure of the "pill". The main confounding factor, it turns out, was weight. Women weighing 155 pounds or more had a 60 percent increased risk of oral contraception failure. And the women at highest risk in this overweight group were those taking birth control pills with smaller doses of estrogen.
Overall, the "pill" has been an effective and safe way to prevent pregnancy. But women, especially those who are overweight, might check with their physician to see if the pill they're on right now is still all they need. For a copy of this script and the journal reference, access our web site, speakingofhealth.com. Speaking of Health, I'm Dr. Steven Andrew Davis for CBS News.
Ref: Holt, VL, et al. Body weight and risk of oral contraceptive failure. Obstet Gynecol
May 2002; 99:820-7. Reviewed by Walling AD, in American Family Physician, Sept 1, 2002; 66:854-5
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