Sara Hertog is a Population Affairs Officer with the United Nations Department of Economic and Social Affairs, Population Division. This week she joins Jeremie and Brian to dive into the fascinating world of demography and population health sciences. Population aging (the increasing proportion of older persons in the population) is the inevitable and predictable consequence of some of humanity's greatest achievements: increasing education and employment opportunities, particularly for women and girls; enabling couples and individuals to decide the timing and spacing of their children; improving health and longevity at all ages. So how does this impact global health? And how will these changes play a role within the UN's sustainable development goals? This and much more in today's Routine Checkup.