Emery explains. To avoid that mix-up, wait at least two weeks after your last hCG injection to take a home pregnancy test, he says. If you were recently pregnant, you might still have leftover hCG in your system.
After childbirth, miscarriage or treatment for ectopic pregnancy , the hormone can remain in your body for up to four to six weeks, Dr.
But you still have to pay attention since a mistake can lead to incorrect results. If you wait too long to read the results, for example, or use more drops of urine than the test calls for?
You might want to take the answer with a grain of salt. Luckily, false positives are rare. And there are steps you can take to make sure your home pregnancy test gives you results you can trust.
This is one reason why an early pregnancy test can be considered a double-edged sword. One of the more frustrating aspects of urine pregnancy tests is that the results need to be read within a certain amount of time. If you take the test and accidentally leave it sitting without reading the results, you can experience what looks like a positive result. To avoid seeing an evaporation line, make sure you read the result within the specified time frame, says Minkin.
Read the instructions before using one to help eliminate the potential for human error and subsequently decrease the likelihood of getting a false positive result. Believe it or not, pregnancy tests have an expiration date. An expired test is more likely to give a false positive or false negative reading. Can you get a false positive pregnancy test from a medical condition? Heather Bartos , MD, an ob-gyn and the medical director of Be. What medications can cause a false positive pregnancy test?
Any positive pregnancy result warrants follow-up with your doctor. Some will schedule an appointment earlier to confirm a pregnancy, but you may have to ask for this specifically. A chemical pregnancy occurs if a fertilized egg, known as the embryo, is unable to implant, or grow, very early on.
This can happen for a wide range of reasons. It may be the result of issues within the uterus, such as:. Low amounts of certain hormones, such as progesterone, can reduce the likelihood of implantation and embryo growth. These early test results, when wrong, can be emotionally draining. Sometimes a fertilized egg can implant itself outside of the main cavity of the uterus.
This causes an ectopic pregnancy to occur. Ectopic pregnancies usually happen if a fertilized egg gets stuck in a fallopian tube during its journey to the uterus. This type of ectopic pregnancy is also known as a tubal pregnancy. The embryo will still produce hCG, even though it has implanted in the wrong place. That can cause a false-positive reading on an at-home pregnancy test.
Ectopic pregnancies are medical emergencies. Ectopic pregnancies can be damaging to the woman if left untreated. Extreme blood loss or loss of the reproductive organs can occur. You may continue to test positive for pregnancy following the loss of a pregnancy, either through miscarriage or abortion.
During pregnancy, hCG levels continue to rise as the placenta grows, doubling every few days and peaking at around 10 weeks. The hormone can remain in your blood and urine for up to six weeks following the end of the pregnancy. This will cause hCG levels to remain elevated. When this occurs, a minor surgical procedure called a dilation and curettage D and C is often required to remove the tissue.
Check the expiration date before using the test. Even with these safeguards, user error can occur. If you have a molar pregnancy which happens in about every 1 in 1, pregnancies it is often picked up in an abnormal ultrasound or you might have symptoms such as early bleeding. This is a rare one, but some medical conditions such as certain kinds of cancer , chronic kidney disease , as well as problems with your ovaries could cause the body to have increased levels of HCG and potentially lead to a false-positive pregnancy test.
Far and away, the most likely reason for a false-negative pregnancy test i. Call your healthcare provider. Previous Next.
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