How late can early pregnancy be detected?

After a woman becomes pregnant, many changes will occur in her body, such as changes in estrogen and progesterone levels, and small fluctuations in body temperature. However, she often cannot feel these changes. When her menstrual period comes, she will find that it has not come yet. This may be due to pregnancy. Then people will use pregnancy test sticks to detect it. Of course, the best thing is to go to the hospital for a check-up, such as using B-ultrasound to detect whether she is pregnant. How long does it take to detect early pregnancy at the latest?

How late can early pregnancy be detected?

For many women, pregnancy is an obviously joyful experience. For those families who are preparing for pregnancy and trying to have sex to have a baby, there is no news more exciting than knowing that they are pregnant. For many people, due to the busy work schedule nowadays, it is difficult for women to realize whether they are pregnant or not, and most of them judge based on the menstrual period. So, how late can pregnancy be detected?

How late can pregnancy be detected?

Generally speaking, you can use an early pregnancy test strip or pregnancy test stick 7-10 days after having sex. However, the accuracy at this time is not high enough. Normally, it takes 9 days after fertilization to ensure accuracy. Because pregnancy tests are generally determined by detecting the HCG concentration in the blood or urine, that is, the concentration of human chorionic gonadotropin, but the change in the HCG concentration in the blood and urine after pregnancy takes a process, so the longer the time after sexual intercourse, the more accurate the test. In addition, there are certain deviations in self-testing pregnancy using early pregnancy test strips or pregnancy test sticks. If you want to further confirm the diagnosis, you need to go to the hospital for testing. A pregnancy test can be performed if the menstruation is delayed for 7-10 days. When a woman becomes pregnant and the fertilized egg implants successfully, during the development of the embryo, the placenta syncytiotrophoblast cells produce a large amount of human chorionic gonadotropin (HCG), which is excreted into the urine through the pregnant woman's blood circulation. This hormone is also important for some pregnancy symptoms, such as breast swelling and nausea. Human chorionic gonadotropin levels can usually be detected in the urine ten days after conception. Therefore, the principles of pregnancy test strips and pregnancy test sticks all come from this. Generally speaking, after intercourse, menstruation can be delayed for about 7-10 days, and you can use pregnancy test strips or test sticks to check whether you are pregnant; blood HCG test can be used to test pregnancy about 10 days after intercourse; B-ultrasound examination needs to be done 5 weeks after intercourse to check whether you are pregnant, among which B-ultrasound is the most accurate. Of course, if you want the most accurate pregnancy test results, the longer the measurement time, the more accurate it will be.

How to use early pregnancy test strips accurately?

Early pregnancy test strips are the first choice for many women to check whether they are pregnant, but many women complain that the results of early pregnancy test strips are inaccurate. Why is this? Come and learn from the editor how to use the early pregnancy test strips!

1. Pay attention to the production date on the packaging box and do not use expired pregnancy test strips, because chemical agents will become ineffective over time or if stored improperly.

2. Read the instructions carefully before doing the self-test, and then follow the instructions carefully.

3. If you do an early pregnancy self-test at night, the accuracy will be affected to some extent, while using morning urine will produce more accurate results.

4. Many early pregnancy test strips indicate that women can do early pregnancy self-tests 1 to 2 days after missing their normal menstrual period. If the self-test result is negative and menstruation has not occurred after 1 week, you should do another self-test.

5. If pregnancy has just started, or there is an ectopic pregnancy, the urine to be tested needs to be left to stand for more than 3 minutes (usually only 1 minute is needed), and carefully identify whether there is a weak positive, that is, the color of the test area is lighter than the color of the control area or only appears faintly.

6. Pay attention to positive self-test results caused by non-pregnancy factors, such as blood in the urine, endometrial hyperplasia, ovarian tumors, recent pregnancy, missed abortion or incomplete abortion, etc.