The last day of my period was the 20th of November. I have not had any symptoms of pregnancy but I think that I may be pregnant. I should have already had or started my period by now but I am still waiting. I would be around 3 weeks pregnant but I am not sure if it is to early to take a pregnancy test.
Learn more about this top honor. The fecal occult blood test (FOBT) is a lab test used to check stool samples for hidden (occult) blood. Occult blood in the stool may indicate colon cancer or polyps in the colon or rectum â though not all cancers or polyps bleed. Typically, occult blood is passed in such small amounts that it can be detected only through the chemicals used in a fecal occult blood test.
Polyps or tumours in the colon have blood vessels that can release a small amount of blood onto the stool when it passes by. Stool tests check for this occult (hidden) blood that you canât see with your eyes. Two types of stool tests are used in Canada to screen for colorectal cancer.Guaiac-based fecal occult blood test (gFOBT). Uses a chemical reaction on a paper card to find traces of blood in the stool.ther reasons for having blood in the stool. Having blood in your stool doesnât always mean that you have polyps or cancer. Blood may come from the colon or from other parts of the digestive tract, such as the stomach or anus. The bleeding can be caused by: 1  ulcers (sores on the lining of your digestive tract).