No pregnancy test at night

With the development of medicine, it has greatly facilitated many female friends. Generally, they can buy pregnancy test strips in the pharmacy to test whether they are pregnant or not. The pregnancy test strips currently on the market are based on rapid testing of HCG in urine and are very sensitive. But some women want to say that they are pregnant, but they can't test it out. Why can't the urine test show pregnancy?

Why can't the urine test detect pregnancy?

What happens if the urine test does not show pregnancy?

1. Inspection time. HCG usually appears in the urine a few days after the embryo implants, and it must reach a certain amount to be detected. Therefore, for women with normal menstruation, HCG can only be detected in the urine after the menstruation is delayed. Women with long menstrual cycles or abnormal ovulation can only be detected after 40-44 days of amenorrhea.

2. Diluent in urine. Drinking too much water may dilute the urine and cause a false negative result.

3. Conducting experiments in the morning and at night may have a certain impact on the results. The highest HCG value is usually found in the urine in the morning, so many instructions recommend testing it when you wake up in the morning, but this is not certain.

4. When testing, pay attention to the length of the pregnancy test paper that is immersed in urine. Sometimes the length of time that urine soaks into the test strip is too long to make the test result indistinguishable.

5. Do not rely on test results to determine whether you are pregnant if you have recently experienced pregnancy. Because HCG can remain positive for a long time after the termination of pregnancy (after childbirth, spontaneous abortion and artificial abortion).

6. Some diseases and treatment drugs may lead to positive results. Some tumor somatic cells, such as hydatidiform mole, choriocarcinoma, bronchial carcinoma and renal cancer, can also metabolize HCG.

7. Do not use expired pregnancy test strips. Since chemicals lose their effectiveness over time, pay attention to the production time when purchasing.

8. Do not use pregnancy test paper that has become damp.

What are the symptoms or feelings of embryo implantation?

1. The body temperature will drop during ovulation, some lower body bleeding will continue, and some expectant mothers will experience muscle cramps. After the sperm and egg combine and the embryo implants, some female friends will have a small amount of bleeding in the lower body, and may even be accompanied by muscle cramps. Some will also have a little bleeding during the menarche, but this is not menstruation, it is the result of embryo implantation.

2. The nipples will be swollen and painful with a dull pain. After the sperm and egg combine and the embryo implants, the hormones in the woman's body will undergo certain changes, which will cause a feeling of swelling and pain in the breasts. If a woman's breasts feel swollen and painful, it is generally a sign of pregnancy.

3. Feeling tired, sleepy and weak. This is because after the embryo formed by the combination of sperm and egg implants, it will secrete a large amount of testosterone, which causes the patient to feel weak in the limbs and dizzy, as if he has a cold. Women who are very good at getting pregnant often have this symptom.