Diagnosis: the methods used to determine the sex of the foetus are, inter alia, ultrasound tests, no prenatal genetic tests, stinging of sheep, fuzzy sampling, blood testing of pregnant women, etc. These methods are subject to medical guidance and are partly risky。
1. Ultrasound
Ultrasound is the most commonly used method of foetal sex determination in clinical practice, usually during the 18-24 weeks of gestation, by observing the external genital form of the foetus. The method is ingenious and safe, but the accuracy rate is influenced by foetal position, operator experience, etc. Ultrasound also allows simultaneous assessment of foetal growth and screening for structural malformations。
2. No prenatal genetic tests
The test of foetal sex chromosomes can be carried out as early as seven weeks of pregnancy, through the extraction and analysis of foetal excursive dna from the exterior blood of pregnant women. The method is highly accurate and has no risk of abortion, but it is a self-funded project and is not a substitute for chromosome disease screening. The results need to be assessed in conjunction with other antenatal visits。
Three, the water piercing
The water piercing takes place during the 16-20 weeks of pregnancy, and an analysis of the chromosomal nucleus of the water cell allows for an accurate determination of the sex of the foetus. The method is used mainly for chromosome abnormalities, with a risk of abortion of about three parts per 1,000. It is not recommended that the examination be carried out for the sole purpose of determining gender, unless there are medical indications。
4. Sampling of wool
The velvet sample is carried out in the 10-13 weeks of pregnancy, and sex is determined by analysis of placental velvet cell chromosomal. The technique produces results earlier than the water piercing, but it is more difficult to operate and has a slightly higher risk of abortion. The sex identification of foetuses for non-medical needs, which is only used for genetic screening, is explicitly prohibited。
Blood testing for pregnant women
Sex is determined by the y-chromosomal specifics of the dna of the foetus in the mother's blood, which can take place after seven weeks of pregnancy. The method produces results earlier than ultrasound, but is likely to be positive. It is prohibited for any institution to carry out a test of foetal sex for non-medical needs, which is regulated by qualified medical institutions。
The laws and regulations of the country explicitly prohibit the identification of foetal sex for non-medical needs. It is recommended that pregnant women undergo regular birth tests, focusing on the overall health of the foetus rather than on gender-specific characteristics. (c) maintain a balanced diet, with appropriate supplements to nutrients such as folic acid and iron agents, and avoid exposure to teratogenic substances. Maintaining moderate exercise, such as yoga for pregnant women, walking, etc., and maintaining a good psychological state. All prenatal tests should be subject to a reasonable choice based on medical indications, under the supervision of a professional physician。
