Current radiation exposure standards are based on an outdated model known as Reference Man, defined as “… a nuclear industry worker 20-30 years of age, weighs 70 kg (154 pounds), is 170 cm (67 inches) tall…is a Caucasian and is a Western European or North American in habitat and custom.” But with current global exposures to ionizing radiation increasing, Reference Man no longer represents the most protective model, leaving out women, children and pregnancy, which are less resistant to radiation exposure.