Abstract
Most large fertility programs in the US impose a BMI cutoff between 35-45kg/m2, above which IVF treatment is withheld. Consequently, patients who exceed this threshold must defer treatment, potentially indefinitely, while attempting weight loss. While there is epidemiological data linking improved reproductive outcomes to weight loss, the reality is that achieving a lower BMI can be difficult, and long term maintenance of weight loss in patients with obesity is low. In addition, the intersection between age and BMI must be considered, as taking time to achieve a lower BMI increases the age at IVF cycle start, which may ultimately be detrimental to live birth rates.
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