Early pregnancy tests work by binding the hCG hormone, from either blood or urine, to an antibody and an indicator. The antibody will only bind to hCG; other hormones will not give a positive test result. The usual indicator is a pigment molecule, present in a line across a home pregnancy urine test.
Gas and bloating is a sign that food is not being digested correctly by the body. An inadequate intake of water will cause excessive stomach bloating. Water benefits the body by aiding with digestion because it supports a majority of the body's daily functions.
Other Causes of Abdominal Bloating. Sometimes your food intake is not the cause of abdominal bloating. Menstrual changes or food intolerance may cause belly bloat or puffiness. So it's important to pay attention when bloating occurs and talk to your doctor if the condition is chronic.