Last menstrual period was 4.15 and the expected date of delivery is January 22 of the following year The due date can be estimated from the time of the last menstrual period and the ultrasound report of early pregnancy. To estimate the due date, subtract 3 or add 9 days from the month of the last menstrual period and add 7 days to the due date. If the estimated due date based on the last menstrual period is too different from the ultrasound, it should be corrected according to the ultrasound results. When pregnancy is confirmed, standardized prenatal checkups should be carried out on time, usually not less than 8 times. Standardized prenatal checkups can prevent and treat pregnancy complications or comorbidities at an early stage, detect abnormal conditions of the fetus in time, assess the safety of the mother and child, and decide on the timing and mode of delivery to more reliably ensure the safety of the mother and child. During pregnancy, pregnant women should eat more food rich in protein, eat more fresh vegetables and fruits, ensure that the food intake is nutritionally balanced, and avoid single nutrition. During pregnancy, pay attention to rest more, at the same time should relax, avoid tension, anxiety, any discomfort should be timely to the hospital, by the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.