If the patient was very healthy before the pregnancy and feels weak around the third month of pregnancy, then consider that it may be related to the following three factors. First, if the patient is weak, accompanied by pain and discomfort, dizziness and other symptoms, consider suffering from a cold. It is recommended that the patient check the blood routine and C-reactive protein. If there is a viral or bacterial cold, it must be treated promptly. Second, it should be considered that the patient may be accompanied by abnormal thyroid function or abnormal blood sugar. It is recommended to check the thyroid function, as well as fasting blood sugar and glycosylated hemoglobin. Check whether there is hyperthyroidism, hypothyroidism, or diabetes. If there is such a condition, it must be treated promptly. Because it will affect the growth and development of the fetus, and even cause the embryo to stop developing and die. Thirdly, it should be considered that the patient has poor eating or nausea and vomiting before the third month of pregnancy, which leads to the patient’s weak physique, so there will be no strength. Then this situation can be appropriate to adjust the diet, check the urine routine to see if there is acidosis. Then adjust the body according to the specific situation.