When a woman suspects she is pregnant, she can also guess the possibility of pregnancy at home by herself based on basal body temperature measurement, judging menstruation or pregnancy reaction if she does not have a pregnancy test or is not convenient to go to the hospital. However, to get accurate results, you still need to visit a hospital.1. Menstrual cycle: The first day of bleeding is the start of the menstrual cycle, and the time interval between the start of two menstrual periods is a menstrual cycle. The normal menstrual cycle is 21-35 days, with an average of 28 days. Women who are fertile and have a history of sexual intercourse may be pregnant if they do not have a period for more than their menstrual cycle or for more than 10 days when their menstrual cycle is usually regular. 2. Basal body temperature: Due to the excitation of the hypothalamic thermoregulatory center during ovulation, the basal body temperature will increase by 0.3-0.5°C after ovulation, and you can measure the body temperature to compare with your usual body temperature. If you are already pregnant, the level of progesterone will remain at a higher level and the body temperature will also remain at a higher level, but there may be other reasons affecting the change of body temperature; 3. Pregnancy reaction: Early pregnancy reaction is a very typical symptom of women in early pregnancy. It will be manifested one month after the fertilized egg is laid, such as menopause, cold, dizziness, weakness, nausea, vomiting, preference for sour food, aversion to greasy food, etc., and also a feeling of breast swelling and pain. Some women may have emotional changes, such as moodiness and negative attitude. When these symptoms occur, there is a possibility of pregnancy. These factors mentioned above are only the symptoms that may occur after pregnancy, and some people may not have these physical changes after pregnancy. Therefore, these symptoms can only be used as a reference to determine whether you are pregnant or not, and the exact result should be obtained by professional testing at a regular hospital.