how soon will a pregnancy test read positive irregular periods?
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If you have irregular periods, try counting 36 days from the start of your last menstrual cycle or four weeks from the time you had sex. At this point, if you are pregnant, your levels of hCG should be high enough to detect the pregnancy.
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For the most accurate results, take a pregnancy test at least a day after you'd normally get your period. If your cycle is unpredictable and your test was negative, you might actually be pregnant but took the test too early.
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If you are still unsure of your result, you should wait at least 3 days before testing again, taking care to follow instructions. For your result to be 'Pregnant' (positive) there must be a blue line in the control window and a '+' symbol in the result window within 10 minutes of performing the test.
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Chemical pregnancy The most common explanation for a "false positive" is that you really were pregnant when you took the test. "Some women can get a positive pregnancy test and then three days after their period is due, they have a really heavy period," says Lanalee Araba Sam, M.D., an ob-gyn in Fort Lauderdale.
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If you have a 28-day menstrual cycle, you can detect hCG in your urine 12 to 15 days after ovulation. If you take a test too early, the test may not detect enough hCG to yield a positive result.
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It can be tricky figuring out when to take a pregnancy test if you haven't been having a regular period. If you've had sex without a condom or birth control recently and you're worried you might be pregnant, the earliest you can take a pregnancy test (and have it be accurate) is 2-3 weeks after sex.
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If you keep having negative pregnancy tests and your period is 6 to 8 weeks late, tell your healthcare provider. Home tests are not 100% accurate. You may get a positive test result even when you are not pregnant if: You are taking antidepressant drugs.
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Our experts answer your pregnancy questions If your cycle is unpredictable and your test was negative, you might actually be pregnant but took the test too early. Even if you did miss your period but it hasn't been at least a couple of weeks since you conceived, you could still get a “false negative.”
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If you get a negative test result and you think you are still pregnant – take another test on the day you expect your period. If your period is overdue, test again three days later. If you are still unsure, see your doctor.
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A pregnancy test will normally be positive shortly after implantation bleeding, but it still may take days. While many pregnancy tests say that you can take them before you missed your period, this is typically only a day or two before.
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"Some women can get a positive pregnancy test and then three days after their period is due, they have a really heavy period," says Lanalee Araba Sam, M.D., an ob-gyn in Fort Lauderdale. "Really what they've had is an early miscarriage called a chemical pregnancy, and a lot of people call that a false positive.
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False negative results (test is negative, but you are actually pregnant) usually occur if the blood pregnancy test was performed too early (a rule of thumb is that it takes at least 7 days after conception for the test to show a positive result).
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Early Detection The most sensitive tests on the market can potentially give you a positive result four to five days before your period is due, meaning you don't necessarily have to wait for a missed period, or watch for other pregnancy symptoms, to find out whether you are pregnant.
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If your period is very late, or you've skipped your period, and you get a negative result, you are unlikely to be pregnant. If you are testing before the date of your expected period, you may be pregnant but your hCG levels are too low for the test to detect.
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If the test is still negative, you are probably not pregnant. There may be another reason you are missing your periods. If you keep having negative pregnancy tests and your period is 6 to 8 weeks late, tell your healthcare provider. Home tests are not 100% accurate.
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As Dr. Roshan explains, a woman's hCG level doubles every 48 to 72 hours, so if you really are pregnant, it won't be negative for long. Take another test in a few days—or around a week after your missed period—and you can trust the results.
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If you think you may be pregnant, wait until the first day after your missed period to take a pregnancy test. If you had ovulation bleeding, this may be about 15 to 16 days after the bleeding occurred.