Medication during pregnancy with caution From planning a pregnancy to be pregnant, be very cautious use of drugs, because many drugs on the fetus can cause varying degrees of damage or teratogenic. Agents to comply with the following principles: 1, some stay and the role of drugs in the body longer, so plan the first 3 months of pregnancy should be careful medication. 2, the entire pregnancy, especially early in the 3 months of pregnancy, better not, or minimize the use of drugs. 3, if the prevalence of non-medication can not, be sure to timely medical treatment, medical diagnosis and guidance in the use of drugs, drug abuse must not be given a free hand to minimize or avoid potential teratogenic effects of drugs. 4, if feeling unwell after treatment, the doctor should immediately stop or switch to other more appropriate drugs. Active in the secondary prevention of pregnancy Regular prenatal care Pregnant women, must be regularly go to the hospital for prenatal care, pregnant women or timely detection of fetal abnormalities, early detection, early diagnosis. Prenatal screening In addition to prenatal screening, prenatal screening maternal blood during pregnancy can also be carried out, that is extracted from pregnant women, a few milliliters of blood, by measuring certain serum markers (pregnancy-associated protein, alpha-fetoprotein and human chorionic free § gonadotropin, etc.), determine the fetal risk of Down's syndrome indirectly, opening the possibility of neural tube defects. Test results can continue normal pregnancy, abnormal prenatal diagnosis should do. Genetic counseling and prenatal diagnosis Delivery of a genetic disease history or family history of pregnant women, should be timely genetic counseling and prenatal diagnosis, early to take the necessary measures to help reduce birth defects in children. What is genetic counseling Genetic counseling, also known as genetic consultations, genetic advice or genetic instructions. Usually, by the professional staff in the medical genetic or doctor, genetic disease that may occur pedigree analysis of children with the couples, the incidence of a genetic cause of disease, genetic methods, diagnosis and prevention, as well as the probability of fetal genetic disease, etc. be estimated and answers, and put forward advice and guidance of birth, so after consulting the couple decide what measures to consider. After genetic consultation, on the risk of certain genetic diseases with a higher risk of the fetus, the need for prenatal diagnosis. What is prenatal diagnosis Prenatal diagnosis, also known as intrauterine diagnosis or prenatal diagnosis, it means the application of modern medical technology and genetic methods in the fetus before birth can be an early understanding of the development of the fetus in the womb status, birth defects and genetic diseases make a diagnosis, for appropriate action. Prenatal diagnosis is an important measure of eugenics, the prevention of birth defects and improve the quality of the population has played an invaluable role. Has one of the following circumstances, the need for prenatal diagnosis 1, maternal age has been reached or exceeded 35 years. 2, the first child of a child for the chromosomal abnormalities. 3 couples one chromosome abnormalities, such as chromosomal translocations or inversions carry a balance. 4, neural tube defects or birth had a child by physical deformity. 5, sex-linked recessive disease gene carriers. 6, couples party with congenital metabolic diseases, metabolic diseases or have given birth to children. 7, during early pregnancy with special clear history of teratogenic factors. 8, there is a family history of genetic diseases or have close family history of marriage. 9, there is unexplained miscarriage, stillbirth, birth defects, neonatal deaths. 10, this pregnancy too much or too little amniotic fluid, were suspected of having teratogenic. What are the common method of prenatal diagnosis? Ultrasound imaging In mid-pregnancy, fetal ultrasound examination can diagnose most of the body deformities. Amniotic fluid puncture Draw the second trimester amniotic fluid for diagnosis, is a safer prenatal diagnostic technology. Fetoscopy Using fiber-optic endoscope, into the amniotic cavity by the abdominal, the direct observation of the fetal surface. Umbilical cord puncture Fetal blood samples collected, can be a variety of cell genetics, blood diseases and prenatal diagnosis of intrauterine infection. Villus biopsy Molecular biology techniques

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