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Apr2007

Weight & Fertility

Greetings,

It's understandably a touchy subject: a woman's weight and whether it impacts her ability to get pregnant or not. In many discussion circles, you'll find sensitive feelings behind the often caustic remarks about "fat phobic" doctors.

What's the truth of the matter?

How Weight Impacts Fertility
Each individual's fertility, their ability to get pregnant, is dependent on many factors. One of the most crucial is the state of the body's endocrine system. Your endocrine system -- a total-body pipeline made up of several specialized organs that make and send out chemicals called hormones -- essentially manages how well the rest of your body's organs function. If your endocrine system isn't balanced and remains in that state, chances are good that eventually, other systems in your body will become unbalanced, too.

How your reproductive system works is highly dependent on whether or not your endocrine system is balanced. It doesn't take much for some bodies to wind up off track. Sudden and acute or chronic and low-grade stress, whether emotional or physical, can be enough for some. Certain health conditions, too, will upset the delicate balance of hormones required for optimal overall and reproductive health.

When a body's endocrine system is disrupted, more problems ensue as a result of either too much or too little hormone being secreted. Sometimes the problems occur when one or more hormones is secreted too early or too late in what is supposed to be a synchronized relay.

One of the conditions that can shake up this delicate network relay of chemicals is the amount of fat on a body. There is evidence that the amount of fat stored in a woman's body -- whether too much or too little -- can be correlated with the production and distribution of important hormones such as estrogen. The result is often ovulatory dysfunction, which will mean far fewer chances at getting pregnant.

How Much is Enough?


A simple way of finding out if your body is balanced weight-wise is a calculation called the Body Mass Index (BMI).

BMI is figured by taking your body weight in kilograms and dividing it by your height in meters squared.

  • BMI 19-25 = Healthy
  • BMI 26-29 = Overweight
  • BMI 30-39 = Obese
  • BMI 40+ = Extremely Obese

Naturally, there's more to healthy weight and fitness than a simple mathematical calculation. But it can be a good starting point to gauge whether or not you might need to talk with a health provider about making lifestyle changes that will impact your fertility.

It's not necessary to be physically perfect in order to get pregnant. However, for people who have any other contributing factors to their infertility -- such as tubal or other structural blockages, other causes of poor ovulation, age beyond 35 years, or male-factor issues - - being over or under weight will only be an additional obstacle in trying to conceive.

On Your Side


I know how difficult it is to make the choice to seek fertility care. I also understand how uncomfortable discussions of weight can be -- many patients already have a sense of shame and guilt about their infertility issues. Talking about weight can sometimes add to the sense of burden.

Rest assured that great strides have been made by research and clinical practice in the successful treatment of infertility for people of all sizes. As a reproductive endocrinologist, I work with every patient individually to help them find healthy balance that will impact their overall health, in addition to optimizing their chances at conception.

Closing


I encourage your questions and concerns, as always.

Sincerely,

Sonja B. Kristiansen, MD