During the procedure. If you have an interval tubal ligation as an outpatient procedure, either a needle is inserted or an incision is made through your navel so your abdomen can be inflated with gas (carbon dioxide or nitrous oxide). Then a laparoscope is inserted into your abdomen.
Climatology is the study of the myriad factors that influence weather, and the influence of weather on the environment. These include water, atmosphere, and geology. Climatology studies all of these things over the course of time, typically a 30 year cycle.
Epidemiology is a field where trained epidemiologists study patterns of frequency and the causes and effects of diseases in human populations. Epidemiology provides the scientific footings for evidence-based medicine and allows placement of strategies for improvement in public health.