When is the most accurate time for early pregnancy test? When can early pregnancy test be used?

Many women tend to use early pregnancy test strips to test whether they are pregnant. But do you know when the test is most accurate? How long after the test is appropriate? What are the precautions when testing?

When is the most accurate time to use the pregnancy test paper?

Many women suspect that they are pregnant after having sex for a period of time, so they buy early pregnancy test strips for testing. However, do you know how to use early pregnancy test strips? When is the most accurate time to use early pregnancy test strips? Many people may not know so well. Grasping the correct time of use is very helpful for women's early pregnancy testing.

At present, it is very common to use early pregnancy test strips to test whether you are pregnant or not, and the accuracy of such tests is relatively high. However, it is worth noting that it is not accurate to use early pregnancy test strips at any time. When is the most accurate time to use early pregnancy test strips? It is recommended that when a woman's menstruation is delayed for 5-7 days, the early pregnancy test can relatively accurately show the result of pregnancy. If it is too early, it is difficult to test it. The accuracy of early pregnancy self-tests at night will be more or less affected, while using morning urine will test more accurate results.

Early pregnancy test strips are designed to facilitate women to detect whether they are pregnant. In general, there are two results of early pregnancy test strips: drop urine into the detection hole on the test strip. If a colored band appears in the control area of ​​the test strip (some test strips are red, and some test strips are blue), it means negative, indicating that you are not pregnant; on the contrary, if a clear color band appears in the detection area, it means positive, indicating that you are pregnant. This test has the advantages of being fast, convenient, sensitive, and highly specific. Early pregnancy test strips can only be used as a preliminary screening test, and you must not overly trust it, because false positives or false negatives may occur when using early pregnancy test strips.

When can the early pregnancy test be detected?

Testing time: The working principle of using early pregnancy test paper for self-testing is to detect HCG value, that is, the value of human chorionic gonadotropin. This hormone is produced by the placenta and generally appears in the urine a few days after pregnancy. However, due to the small amount, it is not easy to detect it at the beginning, and it will not become increasingly obvious until 10 to 14 days. (HCG value can also be measured by blood test, and it is much more accurate). The effect is not good if the time is too early or too late.

It is generally recommended to use the first urine test in the morning for women who have just become pregnant, as the results are more accurate. However, for women who have been pregnant for some time, urine at any time of the day can be used for testing. It usually takes about 7 days from sexual intercourse to pregnancy, that is, the pregnancy can be tested on the day of pregnancy (equivalent to 7 days after sexual intercourse).

Precautions

1. Dilution of urine: Drinking too much water to dilute the urine may lead to a false negative result.

2. Doing the test in the morning or evening may have a certain impact on the results. The urine in the morning generally has the highest HCG value, so many instructions recommend testing in the morning, but this is not absolute.

3. Pay attention to the length of urine that submerges the test strip during testing. Sometimes, if the length of urine that submerges the test strip is too long, it may make the test result difficult to judge.

4. Do not judge whether you are pregnant based on the test results if you have been pregnant recently. This is because HCG can remain positive for a long period of time after termination of pregnancy (after childbirth, spontaneous abortion, and artificial abortion).

5. Some diseases and drugs may cause false positive results. Some tumor cells, such as hydatidiform mole, choriocarcinoma, bronchial carcinoma and renal cancer, can also secrete HCG.

6. Do not use expired test strips. Chemical reagents lose their effectiveness over time, so pay attention to the production date when purchasing.

7. Do not use test paper that has been damp.