Some girls may start menstruating as early as age 10, but others may not get their first period until they are 15 years old. The amount of time between a girl's periods is called her menstrual cycle (the cycle is counted from the start of one period to the start of the next). Some girls will find that their menstrual cycle lasts 28 days, whereas others might have a 24-day cycle, a 30-day cycle, or even longer.
A barium swallow is a special type of X-ray test that helps your doctor take a close look at the back of your mouth and throat, known as the pharynx, and the tube that extends from the back of the tongue down to the stomach, known as the esophagus.
Barium meal. This is similar to a barium swallow (above) but aims to look for problems in the stomach and duodenum such as ulcers, polyps, tumours, etc. You drink some barium liquid, but you then lie on a couch whilst X-ray pictures are taken over your abdomen. It may take a little longer to do than a barium swallow.his test is similar to a barium follow through. However, instead of drinking the barium liquid, a thin tube is passed down your gullet (oesophagus), through the stomach and into the first part of the small intestine.