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Can your test come out positive then negative?
If it's a pregnancy test the answer is no, A test can come back negative even though its positive. But if it's positive, it's positive 99% of the time.
Can a pregnancy test come up negative even if it might be positive?
yes
Where does the positive and negative for blood come from?
The positive and negative blood types come from the presence or absence of certain antigens on the surface of red blood cells. Blood type A has A antigens, B has B antigens, AB has both A and B antigens, and O has neither A nor B antigens. The positive or negative designation refers to the presence or absence of the Rh factor antigen.
Can a A positive blood type mother give birth to Rh negative daughter?
Can a child with RH neg blood come from parents that are A positive and A negative
When you add a positive with a negative does it come out positive or negative?
Its negative
Why would an Rh negative mother and an Rh positive father have difficulties with the birth of their second child?
When the father is Rh positive, it is possible that the child will also be Rh positive. Or, if the father is homozygous ++ or DD, then all of his children will be Rh positive. When an Rh negative person is exposed to Rh positive blood, in this case during birth, they will develop antibodies against the Rh positive blood. This means that if they come in contact with Rh positive blood again, they have antibodies which will attack the Rh positive blood. This is what happens when the mother is Rh negative and the foetus is Rh positive. There usually isn't a problem with the first pregnancy, because the mother might not have been exposed to Rh positive blood before. However, if the second foetus is also Rh positive, the antibodies in the mother's blood will attack the foetus. This ranges in severity, but can cause the death of the foetus. In most cases this is preventable - the mother can receive an injection of anti-RhD immunoglobulin during pregnancy or soon after delivery.
You have taken 5 home pregancies they come up positive you have had two blood tests they both came up negative but the 2 one you took dected something and you had a little bit of human chrorine?
The best way to find out if you are pregnant are the blood tests. I have been mislead by home pregnancy tests before. But in my situation they came up negative and my blood tests came up positive... I was in fact pregnant.
Why would a urine test come out positive before taking and negative after taking antibiotics for a bladder infection when you are on Mircette Birth Control and started your period a week ago?
Bladder infections can spread into your kidneys and then into the blodd stream so they were probably checking to see how far it had progressed. I dont know if you understood my question, i know why they took the urine and blood samples. But i dont understand why a pregnancy urine test would say positive 3 times, pregnancy blood test say negative twice, and then another urine test done 6 hrs after being administered antibiotics come out negative. What was with that first urine test saying positive?
How can you tell if a pregnancy test is positive or negative?
it will come up with a plus or minus symbol. or be reddish pink or blue. try reading the box..
Can parents b positive and O positive have a b negative child?
Yes, it is possible for parents with blood types B positive and O positive to have a child with blood type B negative. This can occur if the parents are both carriers of the negative Rh factor and pass it on to the child.
Which metals attract as opposed to repel?
All of the metals attract and repel, but if a: negative and positive come together= attract positve and a negative come together= attract negative and negative come together= repel positive and positive come together= repel
If you get your period during pregnancy will your pregnancy test results come out negative?
No
