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.
Diet is the main cause of stomach bloating. Food that is high in fructose or fats needs more enzymes to break it down. The stomach acids may not be able to break them down, resulting in gas production. Other foods also are not totally digested and can lead to gas and bloating.