A pregnancy blood test cannot tell if it is a boy or a girl. A simple blood test cannot determine the sex of the fetus, as it is not possible to determine the sex of the fetus. The main purpose of the blood test during pregnancy is to extract human chorionic gonadotropin from the blood for testing, from which it is possible to analyze the presence or absence of pregnancy and to assess the possibility of hemolysis in the newborn. The sex of the fetus is medically contraindicated, and detection of the sex of the fetus is generally not recommended in the absence of special requirements or special circumstances. During pregnancy, it is recommended to undergo regular labor and delivery tests. In addition to routine blood tests, non-invasive DNA screening, Down’s syndrome screening and amniocentesis are also recommended to keep abreast of the development of the embryo and to deal with any problems in a timely manner.