See also fluid volume. Formerly called fluid volume deficit. When a person engages in normal physical activity and the environmental temperature is 20Â°C (68Â°F), the body loses about 2400 ml of water in 24 hours. About 1400 ml are lost in urine, 200 ml in feces, and 100 ml in sweat.
The only medications that can display a false positive test result are those that contain the pregnancy hormone hCG, such as most medications used to treat infertility. Medications that contain hCG, or are used in combination with hCG, include, but are not limited to, Humegon, Pregnyl, Profasi, Pergonal, and Novarel. These may give false positive results if the pregnancy test is performed within 7-14 days of the last drug administration. Antibiotics, analgesics or pain killers, birth control pills, and hormone therapies that contain Clomid or Serophen (clomiphene citrate) should not affect the test result.
Despite a negative test result, itâs very possible that you are pregnant, but the hCG levels are too low for a test to accurately detect it. Another cause of false-negative pregnancy test results is erratic or improper testing techniques. Most test sticks need to be saturated in urine to get accurate results. If you do not leave your test strip in the urine long enough, it could give you false negative or false positive pregnancy test results. Check the date on the pregnancy test before purchasing it. Out-of-date tests will not give you results you can trust. Also remember that certain fertility medications and rare medical conditions may affect the results of pregnancy tests, and false negatives could be more common in these situations.