ASRM estimates that approximately 12 percent of all infertility cases are caused by the woman being overweight or underweight. Weight can directly impact fertility because it can alter the balance of important reproductive hormones that regulate ovulation.
One quick way to estimate if weight might be a factor for concern is calculating body mass index (BMI). This simple formula is based on the relationship between an individual’s height and weight.
If a woman’s BMI is well outside the normal range, she should consult a fertility specialist to determine if her weight may be affecting her ability to conceive. The specialist can also tell her what lifestyle changes might be implemented to help her gain or lose weight as needed. Oftentimes infertility caused by high or low body weight can be corrected when the recommended lifestyle changes are adopted.