A false negative (test is negative, but you’re pregnant) can occur if the blood pregnancy test was performed too early. There may not be enough hCG in the blood to detect a pregnancy. 4 If you believe that you received a false negative from testing too soon, your doctor may repeat the test after 48 to 72 hours.
What can cause a false-negative pregnancy blood test?
False Negative Pregnancy Test: 5 Reasons It May Happen
- Precocious pregnancy test. …
- Irregular menstrual cycle. …
- Ectopic pregnancy. …
- Breastfeeding. …
- The test has expired.
What are the chances of a false-negative blood pregnancy test?
Getting a false-negative pregnancy test because of the hook effect is rare. False-negative test results can happen for many reasons. One older study that tested 27 different kinds of at-home pregnancy tests found that they gave false negatives almost 48 percent of the time.
Can you be pregnant and not have hCG?
An early pregnancy test might pick up very low amounts of hCG. However, it’s possible that you don’t have enough circulating hCG to get a positive result even on a sensitive test.
Can I be 2 months pregnant and have a negative test?
By two months, a negative pregnancy test almost always means that your period is late for a different reason. Although hCG levels rise to a peak and then fall again, they’re usually still climbing until the end of the first trimester.
Has anyone had negative pregnancy tests and been pregnant?
False-Negative Pregnancy Tests
However, this is not always the case. False negative pregnancy tests do occur. Here is how it works: A urine pregnancy test detects the hormone called hCG (Human Chorionic Gonadotropin).
How can you be sure you are not pregnant?
A health care provider can be reasonably certain that a woman is not pregnant if she has no symptoms or signs of pregnancy and meets any one of the following criteria: is ≤7 days after the start of normal menses. has not had sexual intercourse since the start of last normal menses.
Can twin pregnancy cause false negative?
You cannot conclusively distinguish a single pregnancy from twins on a urine pregnancy test. That said, you may have a very early positive pregnancy test if you are carrying twins.
Can you be 8 weeks pregnant and have a negative test?
Sometimes a test can also return a false positive result, detecting pregnancy where none exists, but false negative results are much more common, with as many as 9 out of 15 women testing negative until seven or eight weeks.
What is too early for a blood pregnancy test?
Your doctor can give you a blood pregnancy test as early as 11–14 days after ovulation. To perform a blood pregnancy test, the doctor draws blood from a vein in your arm. This blood is sent to a laboratory for testing. The results of most blood pregnancy tests take at least a couple of days.