After pregnancy, there are usually no obvious characteristics that can indicate a LW pregnancy, either in terms of the preferences of the pregnant woman or in terms of the growth of her abdomen. However, pregnant women with twin pregnancies can have some special reactions in terms of early pregnancy reaction, abdominal changes and frequency of fetal movements, which require more care. Special reactions of twin pregnancies 1. Early pregnancy reactions are obvious: In twin pregnancies, the pregnant woman’s body will secrete more chorionic gonadotropin to promote normal fetal growth, so early pregnancy reactions may be more serious, such as nausea, paranoia and frequent vomiting. And the second trimester is also more likely to have panic attacks, poor breathing, swelling of the lower limbs and other symptoms; 2. Larger abdominal panglossia: In twin pregnancies, the abdominal panglossia of pregnant women will be significantly faster and the abdomen will be more inflated; 3. Poor regularity of fetal movement frequency: When counting fetal movements in late pregnancy, pregnant women will feel a significant increase in the frequency of fetal activity, and during the maternity checkup, they can also observe the different parts and intensity of the fetal heart. When pregnant, male and female are mainly determined by genes and cannot be controlled by man. It is not recommended to identify the sex of the baby, but to let nature take its course and not to care too much about the sex. In vitro fertilization has strict requirements and cannot be performed by couples who do not have the ability to conceive naturally for the purpose of “customized babies”.