Beyond body mass index: a synthesis of other lifestyle factors which may influence IVF outcomes

Abstract

There are several lifestyle factors that are thought to potentially impact on IVF outcomes, including BMI, smoking, alcohol consumption, caffeine, dietary patterns, and physical activity. Eligibility criteria for IVF within England often requires individuals to be none-smokers, drug free, and have a BMI below 30kg/m2. Some researchers have questioned the scientific and ethical basis for the use of BMI thresholds in fertility treatment, citing evidence that other factors may have a greater effect on the chance of success of IVF. This article aims to briefly synthesise the current evidence on how other factors such as smoking, alcohol, recreational drugs, smoking, caffeine, dietary patterns, and physical activity may impact on IVF outcomes.