When the doctor declares that you are at the high risk of the early Tang Dynasty, whether you are thinking blank and panicked. In fact, the high risk of the early Tang Dynasty does not mean that the fetus must be the Tang baby. If you want to further confirm whether the baby's chromosome is abnormal, you can do amniotic puncture to confirm!
Are you a high-risk group for giving birth to DD children?
Down's disease is not a genetic disease. Its main cause is the aging of the egg, which makes the egg cells not separate normally when meiosis; so compared to heredity, the age of the mother is more closely related to the chance of giving birth to a baby Tang.
Pregnant women have aged over 34 years old at the time of childbirth
Family history: Down's disease patients
Previously had Down's childbirth
Pregnant women have aged over 50 years old
Family history: congenital heart disease patients
Family history: Any other genetic diseases, intelligence deficiency, chromosomal abnormalities, and congenital defects in the family
Down's disease screening can be divided into two modes according to pregnancy
1. Early Tang: Screening for early pregnancy (about 11 to 13 weeks) is about 85%.
In order to know in advance whether you have a Down syndrome fetus, pregnant women can choose to undergo initial Down syndrome screening (hereinafter referred to as the Down syndrome) during the first pregnancy, check the cervical sliver belt and other indicators, and cooperate with blood draw to rule out whether there is a risk of Down syndrome.
2. Middle Tang: The screening rate in the middle of pregnancy (about 16 to 20 weeks) is about 83%.
If the screening result index of the early Tang Dynasty is higher than 1/270, or if the pregnant mother who missed the early Tang Dynasty did not undergo non-invasive fetal chromosome testing or amniocentesis, it is often recommended to undergo a mid-term Down syndrome screening, first draw blood and then use two or four biological indicators to rule out the probability of Down syndrome.
Careful reminder: If pregnant women undergo early Tang + mid-Tang tests, the bonus of both can provide a 90% accuracy.
I am a high-risk pregnant mother in the early Tang Dynasty. What should I do next?
If the test results in the early Tang Dynasty are found, the risk of giving birth to a baby with Down syndrome is ≧1/270. It is recommended that pregnant women undergo amniocentesis at 16 to 18 weeks (the accuracy rate is higher than 99%) to further confirm whether the baby's chromosome is really abnormal. Please don’t be nervous first. If the Down syndrome screening report is high-risk, it does not mean that the fetus must be a Tang baby. Down syndrome screening is only a risk assessment.
is worth mentioning that even if the screening in the early Tang Dynasty falls within the safe range, it does not mean that 100% of the baby will not give birth to a Tang Dynasty. Pregnant mothers may suspect that if it cannot be completely avoided, why should screening be done? A simple metaphor: Screening is like crossing a traffic light on the road. High danger is the red light, low danger is the green light. If you encounter a red light, you have to stop it. If you encounter a green light, you can do it. However, are there really dangers when running a red light? In fact, when there is no car, it will be fine to rush over. And is it sure that it is safe to pass the green light? I hope everyone can understand.
High-risk populations need amniocentesis
Amniocentesis is most commonly used to test Down's disease, with a Huai accuracy of up to 99%. Under ultrasound guidance, an elongated needle is passed through the pregnant woman's belly and uterine wall, enter the amniotic fluid cavity, and some amniotic fluid is extracted. Since amniotic fluid contains many cells that fall off from the fetus, including the skin, upper respiratory tract, oral mucosa, upper digestive tract, urinary tract and other cells, amniotic fluid can be used for fetal cell chromosome examination.
What should I pay attention to when I amniocentesis?
The main reason why pregnant women generally reject amniocentesis is that amniocentesis is an invasive examination and there are about three-thousandths of miscarriage opportunities, so many people are unwilling to take risks.
But if you are an elderly mother (above 34 years old), the chance of congenital abnormalities in your baby may be higher than the risk caused by amniocentesis. At this time, you should measure whether amniocentesis should be performed.
The key point is to tell all mothers that after the doctor’s advice, you can decide whether to do amniocentesis by yourself. This is not a necessary item for prenatal examination, so don’t be under too much pressure!
