How long can down’s baby see it? Avoid “Down’s baby”, do not miss these tests during pregnancy

Life most babies are born healthy, but there are about 1 / 100 babies born with mental or physical defects, one of the common diseases is down syndrome. It has also been reported that Down’s syndrome is actually a chromosomal disease, due to the baby’s extra chromosome 21. < / P > < p > we often compare the chromosome to a train, which has 46 carriages. The material in the carriage is a special substance called gene, and there are about thousands of genes in each compartment. Chromosomal abnormalities can occur both in number and in structure. The reason why they look the same is that the abnormal genes that govern their appearance are fixed. Down’s syndrome is one of the most common chromosomal diseases in human beings. It is equal to everyone regardless of the international situation. Hu Yizhou, formerly known as Hu Yizhou, once appeared on the screen for a period of time because of his “Down syndrome”. His intelligence is only equivalent to a child under 5 years old. He is only 1.5 meters tall and weighs 120 Jin. In addition to mental retardation, his body also aged faster than ordinary people. Due to the obvious decline of physiological function and immunity, he later suffered from arthritis and gout and other diseases. In fact, this is also the fate of many “Down’s baby” who can not escape. < p > < p > patients with Down’s syndrome also have severe mental retardation; 50% have various congenital heart diseases; male patients have no fertility, female patients occasionally have fertility, and 1 / 2 of their children will be ill; the risk of leukemia in children is 10-20 times higher than that of normal people; they often have hearing impairment and cannot take care of themselves. < p > < p > according to reports, the probability of having a baby for a pregnant woman under 30 years old is 1 / 1000; after 35 years old, it rises to 1 / 200, and this probability increases with the age of pregnant women. Although older pregnant women are more likely to have Down’s babies, pregnant women of any age are more likely to have Down’s babies. < / P > < p > if there is no down’s screening during pregnancy, most babies with Down’s syndrome can be detected within 3-4 months. They often have small head, flat pillow, round face, flat nose, thin eyelids, and upward tilt, eye distance is too wide. < / P > < p > the Down’s blood screening is usually performed at 14-21 weeks of gestation, and should not exceed 21 weeks at the latest. If a pregnant mother has a special reason and misses the Down’s screening time, there is also a remedial examination, that is, non-invasive DNA test. There are also pregnant mothers who skip down’s screening directly for non-invasive DNA examination due to special reasons. < / P > < p > the noninvasive DNA test is carried out at 12-23 weeks of pregnancy, and venous blood is taken for examination, both of which are screening for down’s. Relatively speaking, the accuracy rate of Down’s screening is about 60% – 70%. The accuracy of screening trisomy 21, trisomy 18 and trisomy 13 can reach more than 98%, 90% and 80%, respectively. < / P > < p > no matter which of the above three tests, we can obtain the fetal gene composition, analyze the fetal chromosome, and confirm whether there is down syndrome. But no matter which of the above examinations, there is a certain risk, puncture will bring about 1% of the abortion rate. < / P > < p > the high-risk results of Down’s screening only represent that the baby has a high probability of Down’s syndrome, and it can’t be diagnosed as Down’s syndrome. Further non-invasive NDA examination or amniocentesis is needed. According to the results of the examination, combined with the doctor’s advice and parents’ decision-making, the final decision on whether to leave the baby or not can be made. < / P > < p > feeling the new life in the abdomen, pregnant mothers often look forward to it with tension, especially when the next day for Down’s screening, some pregnant mothers can’t sleep all night. In fact, there is no need to be so nervous, at the same time, also for all kinds of pregnant mothers who are about to be examined, the baby must be healthy and safe. < p > < p > this article is the original content of this article, focusing on the field of child care, intensive work, silent day shift, to provide more professional science of child care. Focus