Regular vacation means menstruation. For women with irregular menstruation, the expected date of delivery is generally projected on the basis of the month of the last menstruation plus 9 or minus 3, and the date plus 7, and then the time of conception. If the ultrasound results differ from the results of the last menstruation by more than 1 week, it is necessary to correct the time of conception based on the results of the ultrasound in the early stages of pregnancy under the guidance of a professional doctor, but it is not possible to determine the exact time.
At the same time, pregnant women should pay attention to rest during pregnancy, avoid exertion, appropriately increase the intake of high-quality protein such as eggs, lean meat, pay attention to the situation of fetal movement, maintain a happy mood, do not be too nervous.
If the pregnant woman has severe nausea and vomiting, vaginal bleeding, abdominal pain and other discomforts, it is necessary to go to the regular hospital as soon as possible to consult a doctor to clarify the cause of the disease under the guidance of the doctor active treatment.