What is the situation of DNA test during pregnancy

The purpose of DNA testing during pregnancy is to rule out genetic diseases in the fetus, so it is very necessary. If one of the couple has a family history of genetic diseases, suffers from infectious diseases or is an elderly pregnant woman, a DNA test is especially necessary. DNA testing is usually performed before 24 weeks of pregnancy. If the fetus is found to be unhealthy, the pregnancy can be terminated to achieve the goal of eugenics.

Is it necessary to do a DNA test before pregnancy?

Whether both husband and wife are at risk of genetic diseases is the issue that is most easily overlooked when preparing for pregnancy. When planning to have a baby, other issues, including whether genetic diseases will be passed on to the baby, should be considered.

Therefore, pre-pregnancy DNA testing is necessary, and it is very necessary. If you want a healthy baby and protect your baby from genetic diseases, you must do a pre-pregnancy DNA test. Currently, DNA testing is the first step to help your baby win at the starting line. Even if a couple does not show any signs of illness, a pre-pregnancy DNA test can find the "mines" that cause the disease. Since the "mines" have been found, we can safely make adjustments and interventions before pregnancy, effectively control the risk of illness, and even directly avoid the occurrence of the disease.

If prenatal DNA testing is not done for various reasons before pregnancy, non-invasive prenatal genetic testing can also be performed during pregnancy for some high-risk pregnant women. Non-invasive prenatal DNA testing can effectively detect fetal chromosomal abnormalities. Which pregnant women are at high risk? Older pregnant women, pregnant women who have undergone Down syndrome screening before but whose evaluation results are high-risk, including pregnant women with low placenta, low amniotic fluid, etc., are all high-risk pregnant women.

When to do DNA testing for pregnant women

When a woman is pregnant, if she wants to examine the fetus through DNA testing, she must choose an appropriate time to do it.

1. The best time for pregnant women to have their DNA tested is during the 12-24th week of pregnancy. This is a very broad time range, and pregnant women have plenty of time to consider and prepare. When the pregnancy is less than 12 weeks, the fetal DNA concentration is too low to meet the detection requirements. If the examination is conducted after 24 weeks, and if there is a problem with the fetus and the pregnancy needs to be terminated, it will cause great physical harm to the pregnant woman.

2. When pregnant women undergo DNA testing, it is different from the ordinary blood test. Pregnant women do not need to stay fasting and can do it as usual.

3. Pregnant DNA testing and Down syndrome screening are different examination items, which include Down syndrome, Edwards syndrome and Patau syndrome. Even if you have done Down syndrome screening, it is best to do another DNA test.

It is best for pregnant women to undergo DNA testing during the optimal time period to obtain more accurate results. Moreover, after the DNA test, there is no need to do Down syndrome screening as it is already included in the test.

Who should do pre-pregnancy DNA testing?

Through pre-pregnancy DNA testing, we can effectively control the risk of disease, or even nip it in the bud. The following groups are the key groups for pre-pregnancy DNA testing.

The first group of people are patients with hepatitis B or some other viral infectious diseases. If a hepatitis B patient becomes pregnant, the harm to the fetus from vertical infection from mother to child far exceeds that caused by infection after birth. If you are a hepatitis B patient, you should avoid pregnancy during the active period of the virus. Only by undergoing treatment and then becoming pregnant can you be responsible to your baby and your family.

The second group of people are women who have had multiple miscarriages. If you have experienced repeated miscarriages and the cause of the miscarriage is difficult to find out, the editor strongly recommends that both husband and wife undergo a pre-pregnancy DNA test together.

The third group of people are those with a history of genetic diseases. The reason why genetic diseases are transmitted is because they are hereditary. No matter whether the genetic disease manifests itself in oneself or in a relative in the family, in order to prevent the baby from inheriting this genetic gene, it is recommended that couples do a pre-pregnancy DNA test, take special intervention measures, and then get pregnant after the doctor's evaluation is qualified.