Posted By hfhs.md.rcs on March 16, 1999 at 22:43:45:
In Reply to:
SerumFerritin
Serum calcium
Serum globulin electrophoresis
Serum iron
Serum ketones
Serum phosphorus
Serum progesterone
Serum serotonin level
Sodium - blood Testing posted by Michelle on March 16, 1999 at 13:53:07:
I took a home pregnancy test when my period was 3 days late and it came back
positive. I went to the doctor and they immediatly gave me a blood test.
When I called for the results, they told me it was negative. I felt this
was incorrect and took another home pregnancy test and it continues to be
positive. I am 8 days late. What could the problem be? I just want to be
sure one way or the other.
Dear Michelle:
All tests can be in error, including blood tests sent to a laboratory. If you are attempting to become pregnant, have missed your menstrual period, and have positive home pregnancy tests, I would repeat the blood pregnancy test. If it is negative
twiceTwice-a-day, then I must believe it over a home test.
Why do tests give false positive
reactionsAllergic reactions
Allergic reactions to medication
Dermatitis, reaction to tinea
Drug allergies
Febrile/cold agglutinins
Insect bite reaction - close-up
Intradermal allergy test reactions
Positive reaction to allergen
Transfusion reaction? If the reagents in the kit have gone bad; if another
substanceDrug abuse triggers the
colorColor blindness
Color blindness tests
Color vision test reactionAllergic reactions
Allergic reactions to medication
Dermatitis, reaction to tinea
Drug allergies
Febrile/cold agglutinins
Insect bite reaction - close-up
Intradermal allergy test reactions
Positive reaction to allergen
Transfusion reaction; if the test instructions are not being followed correctly; if the container or equipment used for testing is contaminated with urine from a patient who is pregnant, all of these can give a color reaction in a non-pregnant patient.
Keywords: home pregnancy test "false positive".
This information is provided for education purposes and is not a medical consultation. If you have specific questions, please speak with your healthcare provider.