may be detected in urine about 2 weeks after conception (when the egg is fertilized by sperm). It is generally recommended to do the pregnancy
test on the first day of the missing period or any day after that. If you do the test before the expected date of the periods, the result might not be 100 percent correct, since the level of hCG in the urine might not be significant enough to affect the test result.
You can improve your chances for an accurate result by using your first morning urine for the test. This urine has accumulated in your bladder overnight. If you are pregnant, it will have more hCG in it than urine collected later in the day.
If you test too early (before the first day of your missed period), you may get a false negative result because not enough of the hormone has built up in your system. If the test comes back negative but you still suspect you're pregnant, wait a few days, read the directions carefully, and try again. if your test is positive then consult a gynecologist. take care