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Can you get a positive result for a pregnancy test and start bleeding with clots and when you take another test 2 weeks later it says negative?
It means you had a miscarriage.
If you think you are about two weeks pregnant and had a once off heavy bleeding and the pregnancy test showsis positive does that mean you had a miscarriage?
It is possible, but the bleeding could also have been from implantation bleeding. A pregnancy test will show positive for a while after a miscarriage because your body has not rid itself of the HCG (pregnancy hormone) levels yet. The further along you were, the longer a pregnancy test will show positive. I would still be on the lookout for any symptoms of pregnancy, continue taking your prenatal vitamins (or at least folic acid), refrain from alcohol and tobacco and caffeine then in a couple weeks take another test and see. Or you can go to the doctor to either confirm pregnancy or miscarriage.
How long after implantation bleeding will a positive test result?
I believe it may take 2-5 days in order to allow the pregnancy hormones to build up to a level where they can be detected by a home pregnancy test. Having said that, I took a pregnancy test within hours of having an implantation bleed with my son and it appeared positive within seconds!
What is Breslow-Gehan-Wilcoxon Test to compare kaplan curves?
This test evaluates differences between study groups, it allows weighting of time points by the number of cases at risk at each time point
Why should a person that takes an hiv test today also take one in 3 months?
A person may be infected with HIV, but not test positive. It will take time for the virus to spread throughout the body and therefore when they first get infected they will often yield a negative test result since the concentration in the body at that time is still very small. After 3 months if a person tested negative the first time and negative the second time there is very little doubt on whether or not the patient has HIV. However, without the second test 3 months later a person who recently got infected before the original test would have shown a negative test result and actually had HIV.
