How reliable are negative blood & urine pregnancy tests 2 weeks after missing a period?

Most urine tests are 99% accurate if given two weeks after a period was supposed to start. Blood pregnancy tests are MORE accurate than urine, as the urine may not be concentrated enough to test positive. However, there are false negative blood and urine pregnancy tests. Some people have a different form of HCG, human chorionic gonadotropic, and thus test negative when they are in fact positive results, but this is a rare finding. If you google pregnancy tests and accuracy there will be many articles on this subject you can look up.
In general, a blood pregnancy test for a woman with a 28 d cycle is extremely accurate. Other things, like especially stress can cause the period to come on late. Menstruation is a very complicated process. You can see your doctor if it doesn't come on after a month and all home pregnancy tests are negative. If positive, then I guess you should make an appointment with an ob doc, right??? LOL

Let you know in nine months, daddy

Very reliable.

not sure but I would just go to a clinic they will be more reliable.

Pretty reliable. The HCG in your urine is usually very high by then, and you get a positive within seconds. Sometimes our body can play tricks on us. I was once 10 days late and went through 4 pregnancy tests before I got my period. Make a doctor's apointment or visit a free clinic. Their tests are close to 100% accurate.

John, if you have missed your period you best go see a doctor immediately. LOL. Seriously, take her to a doctor to find out for sure. Good luck buddy, you'll need it.

They are very reliable. I took a pregnancy test 5 days before my period and it was positive.

Urine tests are fairly accurate, but always have the blood test done to be completely sure of the result.

Tags

　　Uterine Fibroids 　　Uterine Diseases 　　Uterine Cancer 　　Usher Syndrome 　　Urticaria 　　Urostomy 　　Urine Tests 　　Urinary Tract Infections 　　Urethral Cancer 　　Ureteral Cancer 　　Universal Precautions 　　Understanding Medical Research 　　Ultraviolet Rays

Related information

Should I be worried about having to repeat my urine test?

Not at all. If they suspected something serious they would have had you come in, or they would have had you do additional tests right away. If they said "signs of a minor infection", th...

Can a urine drug test tell how much of a drug you actually took?

The urine test is a qualatative test not quantatative. However, the urine tests can report back (Negative, Trace Amount, +, ++, and +++ ) for the drug. They cannot tell specifically how many you to...

24 hr urine test?

She should not ingest anything that she would not ordinarily consume. If they're checking for protein in her urine, they're looking for something VERY specific (what should be explained ...

Passed urine test, then failed, no smoking??

That all depends on how long you consider "quite some time" . To be honest maybe 1 in a 1000 over the counter tests "maybe" it will give a false positive if you are completely c...

Why a 2-day drug test?(urine)?

Your first urine sample was too dilute. Most labs also test for a muscle breakdown product called creatinine. If your creatinine level was too low (because you drank too much fluid beforehand) th...

Urine & Blood Test?

It's possible to switch out urine, people do that quite often actually. Just make sure the urine is warm but not too warm, if you are giving the sample while at the MD's office. If you a...

Blood test vs urine test?

There are more things in urine than you think. Urine is a waste product. You can find hormones ( pregnancy test-HCG), amino acids (cysteine), DNA of gonnorhea and chlamydia, heavy metals/toxins...

Took a urine test with a sample that was clear as water?

The test will show it to be dilute, and thus it is suspected of being positive. A good toxicology lab will be able to detect the chemical anyway!!!

...