The physiological conditions of women in the first week of pregnancy are obvious in the following aspects: a. In the first week of pregnancy, there will be adverse reactions of the digestive system, such as nausea, vomiting and anorexia, which are more obvious in the morning, and in some women at noon and at night, which vary from person to person because of individual differences. Some women will have frequent urination, urgent urination or incomplete urination, which is related to the change of hormone level in the body at the beginning of pregnancy, especially estrogen, progesterone and anti-diuretic hormone, leading to the important cause of the temporary disorder of the function of the urinary system, which leads to the above symptoms. Third, there will be changes in mood, the first week of pregnancy will appear mood fluctuations, such as irritability, irritability, anxiety, etc., related to the increase in the excitatory transmitter dopamine in the brain.