Simple and non-invasive method — ultrasonography (us) of the fetus. If you want to use them ask watching the pregnancy obstetrician-gynecologist to prescribe you this procedure. But do not hope that the result will be completely accurate. Sometimes it happens that the doctor does not manage to a desired body part of the fetus. There are frequent mistakes, especially in the early stages of pregnancy. By the way, it is believed that the sex of the baby by ultrasound cannot be determined until the 12th obstetric weeks. Accordingly, for early diagnostics of sex, this method is not suitable.
If there is a serious need to know the sex of the fetus on early terms of pregnancy, it is possible to carry out a genetic analysis of cells. To do this, select a laboratory that provides such procedures as amniocentesis, cordocentesis or biopsy of chorionic villi. All of them are the material for the shells of the fetus having the same genotype as the child. In the future the cells sent to a laboratory to identify chromosomes responsible for gender. The material is extracted with a special needle, piercing the belly of the mother and the shell of the fruit, which increases the risk of miscarriage. Therefore, this procedure should be done only if you have a family history of genetic diseases, sex-linked.
In addition, it is possible to determine the sex of the child from the blood of the expectant mother. This method is based on the presence in maternal blood of a small number of fetal cells. If the analysis reveals a Y chromosome, it can be argued that the male fetus. The procedure can be performed from the 7th week of pregnancy. Researchers believe that the analysis accuracy can be close to 100%, but the method has not widely used.
In the conception of a child using techniques of in vitro fertilization when needed is the procedure of preimplantation genetic diagnosis. It consists in the analysis of the genetic material of all of embryos before transferring them into the uterus.