The reactions of pregnancy are as follows: a. Menopause For women whose periods have been regular, if after intercourse you find that your period for the month is delayed and does not come, you need to suspect whether you are pregnant. And for women who have irregular periods themselves, when symptoms such as nausea or frequent visits to the toilet occur, it is a sign that they may be pregnant. Second, breast pain, breast pain is also one of the common reactions to pregnancy, because after pregnancy, the hormone level in the body of pregnant women will increase, so it will lead to breast pain, breast pain will improve in the first three months of pregnancy. Third, nausea, vomiting, nausea, vomiting is the most common pregnancy reaction, most women in the first month of pregnancy will appear nausea, vomiting feeling. However, because each person’s constitution is different, it may lead to the whole pregnancy without pregnancy vomiting, some pregnant women may continue to nausea and vomiting.