-
The most fundamental reason for congenital malformations such as anencephaly is that the health care work during pregnancy is not done, especially in the first trimester, because within eight weeks after conception, the embryo has almost completed the basic development of various organs, systems of human body shape and limbs, during this period, if the first child, such as bacteria, viruses, pesticides and other chemicals lead, mercury and other metals act on the mother and affect the fetus or the fetus itself has abnormal development, the fetus will have serious malformations such as anencephaly spina bifida, cleft lip and palate, congenital heart disease, polydactyly, missing fingers, etc., Obviously, doing a good job in health care within eight weeks of pregnancy is the key to preventing congenital malformations, and the reasons for the incomplete closure of the neural tube in embryonic children are: first, chorionic gonadotropin insufficiency, second, some people believe that vitamin B12 and folic acid deficiency can affect embryonic neural tube closure, third, hyperemesis gravidarum or pregnant women have diabetes caused by ketoacidosis, and fourth, pregnant women have a high fever of more than 38 degrees for more than a week.
-
It may be because of eating too many brain fragments, as for the parents, there is also a direct relationship, if they both take this medicine, they must control the dosage.
-
In the case of short-answer questions, which means that you can find the answer quickly, such questions are generally called short-answer questions.
-
Anencephaly is due to the lack of development of the central nervous system, and the head does not heal.
-
It may be at the time of pregnancy, stunted growth.
-
Hello friend, when I am old, it must be a problem with nutrients or hereditary genes.
-
Anencephaly is when genes are synthesized and this part of the genes is missing.
-
Anencephaly is the result of a combination of genetic susceptibility and environmental factors:1Genetic predisposition refers to a marked increase in the number of children born to the same defect in parents who have had a history of pregnancy and anencephaly.
2.Geography, ethnicity, diet, teratogen exposure, maternal diabetes, and maternal hyperthermia are also known factors that contribute to anencephaly. 3.
Folic acid insufficiency: Folic acid deficiency can increase the chance of developing the disease. 4.
Abnormal folate metabolism: Although studies have shown that folic acid reduces the occurrence of neural tube defects, about 30% of cases do not respond to folic acid supplementation. May be related to defects in folate metabolism genes.
It is true that culture is not the only factor influencing communicative behavior, and this view can be understood from the following aspects: >>>More
Copyrights include: written works; oral works; **, drama, opera, dance, acrobatic artworks; works of fine arts and architecture; photographic works ; cinematographic works and works created in a manner similar to that of filmmaking; engineering design drawings, product design drawings, maps, schematic drawings and other graphic works and model works; computer software; Other works provided for by laws and administrative regulations.
Answer]: Shou Sakura D
The moonlight is born in the sun, the spirit is born in the sun, and the sun is bright. The sun is gone" is Zhang Heng's scientific explanation for the lunar eclipse. >>>More
The achievement of results should be grasped with both hands, and both hands should be hard: one is to grasp the book knowledge, and the other is to grasp the problem-solving strategy, that is, the ability to take the test. >>>More
This patriotic education must have something to do with one's own education, so patriotism is also manifested through such an educational method.