Taking another test within 1 week is a good idea, whether the first result was negative or positive. This can occur for a number of reasons, including: However, false-negative results are common.Ī person who gets a negative result may be pregnant, and the test may not be detecting it. False positives can occur due to:Ī negative result means that pregnancy is unlikely.

This means that the person taking the test is not pregnant, but the test says that they are. Very rarely, a false-positive result occurs. This is true even if the color change, word, or symbol on a home test is faint.Īnyone who gets a positive result should contact a healthcare professional right away. Positive resultĪ positive result indicates pregnancy. If a person takes a clinical test, a healthcare professional explains the results. It is important for anyone using a home test to follow the instructions carefully and understand what each color change or symbol indicates. It is more likely for a negative result to be incorrect. how well the person has followed the testing instructionsĪ positive result typically indicates pregnancy, while a negative result tends to mean that the person is not pregnant.how quickly the fertilized egg implants.when the person tests, as hCG levels easier to detect first thing in the morning.This might result from a person having irregular periods or miscalculating when their period was due.īut various other factors can influence the accuracy of pregnancy tests, including: Most tests can produce accurate results on the first day after a missed period, but to ensure accuracy, it is advisable to start testing 1 week after a missed period.įor around 10–20% of pregnant people, a home pregnancy test does not accurately detect the pregnancy on the first day of their missed period. However, these accuracy claims assume that the person has used the test correctly. A negative result is more likely to be incorrect. Many home pregnancy tests claim to be accurate up to 99% of the time. A quantitative hCG blood test measures the total amount of the hormone present in the person’s system and can detect even very small amounts of the hormone.

A qualitative hCG blood test checks whether the hormone is present in a blood sample. These are less common than urine tests, but they can give results earlier in a pregnancy. Some facilities provide results immediately, while others may take up to a week. Like home tests, clinical tests look for the presence of the hormone hCG in the person’s urine. Otherwise, the level of accuracy is the same as with home testing. A person may opt for this to avoid some of the handling errors that can happen with home tests. This involves going to a doctor’s office to give a urine sample. Some can even indicate how far along the pregnancy is. Digital tests have a screen that displays “pregnant” or “not pregnant” or a symbol. These tests usually give results within 5 minutes, though the timing of different tests may vary.Ī standard home pregnancy test has a strip that changes color or displays a symbol, such as a plus or minus sign, to indicate the result. If a person uses them correctly, they give accurate results. Home pregnancy tests are available over the counter, and they are typically inexpensive. A urine test can typically detect hCG 12–15 days after ovulation. Levels of hCG change throughout pregnancy. This hormone starts circulating once a fertilized egg has attached to the wall of the uterus wall, which usually happens 6 days after fertilization.

Whether a person has one in a clinic or at home, these tests check levels of the pregnancy hormone called human chorionic gonadotropin (hCG). There are two main types: urine and blood tests. But it’s still possible for some pregnancy tests to fail at detecting hCG a week after conception.Share on Pinterest Marko Geber/Getty Images “They can now detect pregnancy earlier and are accurate most any time of day.”Īccording to Heidi Murkoff and Sharon Mazel, authors of What To Expect When You’re Expecting, once an embryo begins implanting itself in the uterus, between six to 12 days after fertilization, hCG can already be detected in the blood and urine. Just pee and wait for the test to detect levels of human chorionic gonadotropin (hCG), a hormone produced by a developing placenta, and find out if you have a baby on the way.īut how reliable are these kits? “Home pregnancy tests have come a long way over the years,” tells Stephen Rechner, M.D., the division chief of General Obstetrics and Gynecology at Spectrum Health in Michigan, USA, to. The easiest way to find out is by taking a home pregnancy test. Thanks to technology, you don’t even have to go to an ob-gyn ( yet !) if you suspect that you are pregnant. Kung gusto mong basahin ang nakasulat dito sa Tagalog, mag-click lamang dito.

Negative positive pregnancy test