Relatively stable after 4 months of pregnancy, but still need to pay attention to appropriate rest. In the early stages of pregnancy, due to the unstable development of the embryo, we must pay attention to appropriate rest, but also can not be strenuous exercise and overwork, prohibit coitus, to avoid increasing the risk of miscarriage. When the fourth month of pregnancy has reached the middle pregnancy, at this time the placenta has been formed and the function is gradually perfect, so at this time will be stable point, but still need to appropriate rest. Mid-pregnancy is the rapid growth of the fetus, under the guidance of the doctor to adjust the diet structure to ensure that the intake of adequate nutrition, eat more food rich in protein, iron, calcium and vitamins and other nutrients, such as dairy products, meat, eggs, poultry and fresh fruits and vegetables. You can also do a moderate amount of moderate-intensity physical exercise to maintain appropriate weight gain during pregnancy. During pregnancy, you should pay attention to rest more, at the same time, you should relax, avoid tension, anxiety, any discomfort should be timely to the hospital, the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.