If you missed two periods but doctors urine sample was negative could still be pregnant?

If you have missed two periods and a doctor's urine sample came back negative, it is still possible that you could be pregnant.

Here are a few reasons why:

1. Early Pregnancy: If you are in the very early stages of pregnancy, the levels of human chorionic gonadotropin (hCG), the hormone that is detected in urine pregnancy tests, may not be high enough to be detected. It can take several days to weeks after a missed period for hCG levels to reach detectable levels.

2. Timing of the Test: The timing of the urine sample can also affect the accuracy of the test. For a urine pregnancy test to be most accurate, it should be taken first thing in the morning when hCG levels are at their highest. If the urine sample was taken later in the day or if you drank a lot of fluids before the test, it could dilute the urine and make it harder to detect hCG.

3. Sensitivity of the Test: Different urine pregnancy tests have different levels of sensitivity. Some tests are more sensitive and can detect lower levels of hCG than others. If the urine sample was taken with a less sensitive test, it is possible that the test could have missed the hCG hormone.

4. Certain Medications: Some medications, such as diuretics, can interfere with the accuracy of urine pregnancy tests by diluting the urine. If you are taking any medications, it's important to let your doctor know so they can assess whether the medication could be affecting the test results.

5. Medical Conditions: Certain medical conditions, such as thyroid problems or kidney disease, can affect the accuracy of urine pregnancy tests. If you have any underlying medical conditions, it is important to let your doctor know so they can interpret the test results accordingly.

If you have any concerns about the results of your urine pregnancy test or if you have missed two periods, it is always best to follow up with your doctor for a definitive diagnosis. Your doctor may recommend a blood test, which can detect lower levels of hCG than a urine test, or an ultrasound to confirm or rule out pregnancy.