Pregnancy before reaching 13 weeks is the early stage of pregnancy, medically known as early pregnancy, also known as early pregnancy. The symptoms of early pregnancy mainly include menopause, early pregnancy reaction, frequent urination and breast changes. The early and late appearance and severity of early pregnancy symptoms vary among pregnant women with different body types and different living environments, and the common symptoms are as follows: 1. Menopause: It is the earliest symptom of early pregnancy. For women of childbearing age with normal sexual life, if they have regular menstruation, they should be highly suspected of pregnancy once they have menstruation for more than 10 days (menopause for 10 days). 2.Early pregnancy reaction: Early pregnancy reaction can occur in women after pregnancy due to the change of hormone level in the body, such as coldness, dizziness, weakness of limbs, drowsiness, nausea and vomiting, dislike of greasy and sour food, etc. It mostly appears about 6 weeks after menopause and usually disappears by itself about 12 weeks. The reaction can be light or heavy due to the different physical quality of individuals, the light ones can be relieved after paying attention to diet and rest; the heavy ones need to be hospitalized for rehydration and adjustment, such as severe pregnancy vomiting, which leads to inability to eat and water due to heavy nausea and vomiting reactions, electrolyte (mainly K ion) disorder in the body, increased ketone bodies, and in serious cases, miscarriage or ketoacidosis of pregnant women. 3. Frequent urination: In the early stage of pregnancy, the enlarged uterus presses the bladder in front of the pelvic cavity, causing the pregnant mother to have the urge to urinate, so she urinates frequently. As the pregnancy lengthens, the enlarged uterus gradually enters the abdominal cavity and the symptoms of frequent urination gradually disappear. 4, breast changes: pregnant mothers can feel breast swelling and pain, breast volume gradually becomes larger, nipple areola enlarges, coloring deepens, Montserrat’s nodes (dark brown nodules around the areola) may appear, gynecological examination sexual duplex examination can appear black plus sign (uterine isthmus is extremely soft, feeling that the cervix is not connected with the uterine body). Early pregnancy is a critical period for fetal development. When women of childbearing age with normal sexual life find delayed menstruation or the above-mentioned related symptoms, they need to clarify whether they are pregnant in time; if they are clearly pregnant, it is recommended to deal with them in time if the early pregnancy reaction is heavy.