Women in the study who were severely obese were 43% less likely to achieve pregnancy than normal-weight women or women who were considered overweight but not obese during the yearlong study.
The study is among the first to examine the relationship between body weight and infertility in women who ovulate,
"We found that obesity is an additional risk factor for infertility in women who have regular [menstrual] cycles," . "This is important given the increase in obesity worldwide."
Obesity and Infertility
WORLD WIDE followed 3,029 couples who were having trouble conceiving on their own.
All the couples had spent a year or more trying to conceive, and none had obvious reasons for fertility problems -- the women were ovulating and had at least one functioning fallopian tube, and the men had normal semen analyses.
The couples were followed until pregnancy was achieved or until they started fertility treatments. In addition to a fertility history, the women's weight, height, and smoking status were measured at study entry.
The women were classified as underweight, normal weight, overweight, or obese based on their body mass index (BMI).
The vast majority of the study participants (86%) were either normal weight or overweight.
An additional 10% were obese, with BMIs of 30 or more. These women had the most trouble conceiving during the yearlong observation.
For example, a woman with a BMI of 35 was found to be 26% less likely to achieve a spontaneous pregnancy than women who were normal weight or overweight but not obese.
A woman with a BMI of 40 or more was 43% less likely to get pregnant.
The study is among the first to examine the relationship between body weight and infertility in women who ovulate,
"We found that obesity is an additional risk factor for infertility in women who have regular [menstrual] cycles," . "This is important given the increase in obesity worldwide."
Obesity and Infertility
WORLD WIDE followed 3,029 couples who were having trouble conceiving on their own.
All the couples had spent a year or more trying to conceive, and none had obvious reasons for fertility problems -- the women were ovulating and had at least one functioning fallopian tube, and the men had normal semen analyses.
The couples were followed until pregnancy was achieved or until they started fertility treatments. In addition to a fertility history, the women's weight, height, and smoking status were measured at study entry.
The women were classified as underweight, normal weight, overweight, or obese based on their body mass index (BMI).
The vast majority of the study participants (86%) were either normal weight or overweight.
An additional 10% were obese, with BMIs of 30 or more. These women had the most trouble conceiving during the yearlong observation.
For example, a woman with a BMI of 35 was found to be 26% less likely to achieve a spontaneous pregnancy than women who were normal weight or overweight but not obese.
A woman with a BMI of 40 or more was 43% less likely to get pregnant.
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| AFTER TRANSFORMATION |
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| BEFORE TRANSFORMATION |
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