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Besides the usual errors (human, technique, bad batch of reagents, etc) ...

you've also got the variation in human physiology,

and diseases which mimic pregnancy.

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14y ago

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Related Questions

You are 3 weeks late of your period but no signs of pregnancy?

Pregnancy tests are not always right. Plus 3 weeks is quite a bit of time, you should go see your doctor, you will get a more accurate test.


What is the right time to determined pregnancy before a missed period?

Pregnancy can be determined by todays over the counter tests as early as 3-5 days after fetilization, which is roughly the same time as ovulation (egg release). Therefore, its a question of when the person ovulated, and not when the missed period is. Home pregnancy tests can be positive even before a missed period.


If you have just finished your 5th period and then had 4 pregnancy tests and all are positive but your only 13 but have had sex are you pregnant?

Time to speak to you most calm parent, and go see a doctor right away. It is possible to be pregnant, but only blood work will be for sure.


If your 2 weeks late for your period but had a negative home pregnancy test?

Pregnancy hormone likely would have been detected by this time, but due to varying sensitivities of different pregnancy tests, you could certainly be pregnant. It would be wise to try several types of home tests. The first urine of the morning has the highest concentration of pregnancy hormone. You could always go to your doctor and have a blood test to be certain.


Would you know if you were 5 month pregnant?

most likely unless your a wee bigger then most of the time you should know if you wanna make sure go to your doctor or take a couple pregnancy tests!! and then you should get your answer!!


You are 16 and are 2 weeks late for your period you have taken tests and they are negative and you have no other symptoms you and your boyfriend use condoms every time any help much apreciated?

Take blood tests at the doctor and don't trust the home pregnancy tests. Then you will know for sure. Also the period messes up sometimes, especially when you are young.


Can you get a positive pregnancy test 6 days after sex?

Pregnancy tests, either the at-home tests or the bloodwork done at the doctor's office, measures the presence of the hormone hCG in your blood or urine. This hormone is released after conception. A home pregnancy test can detect the hormone 7-14 days after conception, depending on how sensitive the home pregnancy test is. They typically are 97-99% effective. The best time to take the test is first thing in the morning, or to wait several hours since the last time you've urinated. Drinking large amounts of water and frequent urination can cause the test to be inaccurate. Bloodwork done at the doctor's office is considered more accurate. It can detect pregnancy 7-12 days after conception.


Haw is a pregnancy test kit used?

Most test kits require the female who is being tested to urinate on a tester, wait the time required (it will be written on the box) and then the result would then appear. These types of tests are NOT 100% accurate and seeing a Doctor is the best way of testing pregnancy.


Is sensation in the breasts a sign of pregnancy?

Was for me each time! Worth cking with a doctor or doing a home pregnancy test.


If I am 2 weeks late for my period having mild pelvic cramps 5 negative pregnancy tests tired all the time am i pregnant or is something wrong?

Go see your doctor about it. If you are throwing up, you may be pregnant.


What are pregnancy tests?

Pregnancy tests are devices that measure the chemicals in your body. During pregnancy there is a presense of or increase in some natural chemicals, which are used to determine if you are pregnant. The pregnancy test will measure the balance of these chemicals and gives you a reading. These tests however, can have altered results based upon when you take it. I believe the best time to take a pregnancy test is 4-6 weeks after fertilization[the point when the spem meets the egg]


Can you still be pregnant if pregnancy tests come out negative every time you take one?

that depends if ur having sex and then taking the pregnancy test