Why can t the test strip test strip test come out because of the blood drawn pregnancy

In this special case, some people's urine cannot be detected, and it may not reach a certain number of days! From the first day of your last menstrual period, it will take at least 40 days for the urine test to come out! You can try it out in 45 days at the latest!

However, some people can only prove their pregnancy by checking their blood, and after pregnancy, the urine of pregnant women contains a substance excreted from the fetus, while some pregnant women have very little of this substance in their urine, so the test strip will lose its effect! The test strip is based on this substance to accurately determine whether you are pregnant! During early pregnancy, this substance is too scarce, so a blood test will find out!

Because, as long as you are pregnant, which substance enters the bloodstream first, blood and fetus are the first to provide nutrients for the fetus!

Hello, there is no need to have an empty stomach for blood sampling to check for early pregnancy. Tests for early pregnancy include blood HCG and blood progesterone, both of which do not require fasting.

There is no difference between the levels of blood HCG and blood progesterone after fasting and those after eating. If the patient has hepatitis, or impaired liver function, or has previous diabetes or blood lipid problems, for this situation, it is necessary to check for early pregnancy, and further examination of liver function, kidney function, blood glucose, and blood lipids, and for this case, fasting blood tests are required. In addition, if you simply check the blood for HCG and progesterone, you do not need to test on an empty stomach.

Hope mine is helpful to you.

Early pregnancy test strip is a good assistant for couples preparing for pregnancy, early pregnancy test strip is also the earliest test pregnancy, the most direct and easiest way, is the best choice for many women, so, what happens if the blood test is pregnant and the test strip can't be detected? What are the reactions in the early stages of pregnancy? What should I pay attention to when pregnant?

Can ovulation test strips detect early pregnancy? In general, ovulation test strips are not recommended for early pregnancy because of their low accuracy. The principle of using ovulation test strips to test early pregnancy is that HCG has two chains and , of which the structure of the chain is basically similar to LH and FSH, and it is easy to cross-react, so the medical judgment of pregnancy is generally taken as the standard.

Because of the crossover between HCG and LH, sometimes ovulation test strips also respond to early pregnancy. Therefore, before the early pregnancy test strip, the ovulation test strip has already detected the first pregnancy. In fact, ovulation test strips are not accurate in measuring early pregnancy.

The absence of weak impotence on an ovulation test strip does not indicate that there is no pregnancy, as cross-reactivity is not inevitable. Therefore, although many women want to use ovulation test strips to measure early pregnancy, in view of its low accuracy, we do not recommend everyone to use ovulation test strips to measure early pregnancy. Why can I use ovulation test strips to test pregnancy?

When a woman becomes pregnant, a specific hormone called chorionic gonadotropin (HCG) is produced in the body. HCG has two chains, and the structure of the chain is basically similar to luteinizing hormone (LH), which is prone to cross-reactivity. When the LH detected by the ovulation test strip cross-reacts with the HCG released after implantation of the fertilized egg, the ovulation test strip will be positive, indicating the possibility of early pregnancy.

Therefore, ovulation test strips can be used to measure pregnancy, but the accuracy of ovulation test strips to measure pregnancy is very low, and it is generally not recommended.

The rate of correct testing for pregnancy test strips varies widely, ranging from 50% to 98%. **Experts point out that women do pregnancy self-tests at home without any outside guidance, and the general test results can only achieve an accuracy rate of 50% to 75%. If the test is done in the laboratory in front of a doctor, the doctor can make sure that the test strip is working properly and that the woman is able to use the test strip correctly and according to the instructions, and the test accuracy rate may be close to 100%.

However, in practice, it is not easy to use it correctly according to the instructions. For a woman who is nervous and panicked because she is afraid of pregnancy, mistakes are inevitable because she cannot calmly and patiently follow instructions. Moreover, the test results are also very confusing, whether it is the color reaction or the line reaction, it is difficult to explain.

In addition to this, there are other obstacles to obtaining accurate test results. Although many types of early pregnancy test strips indicate that a woman can take a pregnancy self-test after 1 day of missing her normal period, in fact, this varies from person to person. Therefore, it is best to wait two weeks after your menstrual period is late before taking a pregnancy self-test so that the results will be more credible.

If you take a pregnancy self-test at night, the accuracy will also be affected to a greater or lesser extent. In general, the most accurate results will be measured with the urine that is excreted for the first time in the morning. At the same time, there are quite a few non-pregnancy factors that can lead to a positive test result:

For example, blood in the urine, recent pregnancy (after miscarriage, abortion or 8 weeks of childbirth, etc.), ovarian tumors, etc.

What happens if I can't ovulate with a blood test strip when I am pregnant? Now there are many ways to test for pregnancy, we all know that for some young people, they prefer to use pregnancy tests and test strips, however, some friends told me that the accuracy of pregnancy tests and test strips is not high, so, how to test pregnancy? Next, let's find out together.

There are many ways to quickly test pregnancy, and the test time is different for different test methods.

Pregnancy test strip test: You can check whether you are pregnant by the pregnancy test strip about 3 to 5 days after menstruation. For women with normal menstruation, HCG may not be detected in the urine until menstruation is delayed.

Women with long menstrual cycles or abnormal ovulation can only be detected after 40-44 days of menopause.

Blood HCG test: The "quantitative" test of HCG value through blood can respond more sensitively and accurately to whether or not to pregnancy than the ordinary "qualitative" detection of urine with early pregnancy test strips, with an accuracy rate of more than 99%. In addition, for multiple pregnancies, ectopic pregnancies, abnormal embryonic growth retardation, molar pregnancy, certain endocrine diseases or tumors, etc., the blood HCG value can often be judged through comprehensive analysis by combining the clinical situation and other examination results.

Urine HCG test: Urine HCG pregnancy test method refers to the detection of whether a woman is pregnant by testing whether she has HCG in her urine. In order to improve accuracy and reduce errors, it is best for female friends to go to the hospital for blood HCG testing.

Ultrasound test: Some women mistakenly think that they can use ultrasound (ultrasound) to check when they are pregnant, but in fact, they need to wait until about 5 weeks of pregnancy to see if there are blastocysts left in the uterus.

During pregnancy, some pregnant mothers will easily experience leg cramps. So, why are these phenomena occurring? What does the presence of cramps prove that the pregnant mother needs to improve? Let's take a look at the causes of leg cramps in pregnant women!

1. Overnutrition. Excessive diet causes excessive intake of protein-rich proteins, which affects the metabolism of carbohydrates, leading to the accumulation of acidic metabolites and causing electrolyte imbalances. One of the manifestations of electrolyte imbalance is cramping.

2. Stand for a long time. Walking too much or standing for too long during pregnancy will increase the activity of the calf muscles, increase the burden on the leg muscles, and lead to the accumulation of local acidic metabolites, which will cause muscle spasms.

3. Poor sleeping posture. Poor sleeping posture, lying on your back for a long time, pressing the quilt on the top of your feet, or lying prone for a long time, making the top of your feet against the bed, forcing some muscles of the calf to be in an absolutely relaxed state for a long time, which is easy to cause leg cramps.

4. Lack of calcium in the body. After pregnancy, the baby's nutritional needs increase, especially the absorption of calcium, especially in the second and third trimesters, the daily calcium requirement increases to 1200 mg. If the dietary calcium and vitamin D content is insufficient or there is a lack of sunlight, the calcium deficiency will be exacerbated, which will increase the excitability of muscles and nerves.

Calcium levels are lower at night than during the day, so calf cramps often occur at night.