Midtrimester refers to 12-28 weeks of pregnancy. The occurrence of bleeding but no abdominal pain during this period should be taken seriously. Common causes include placenta previa, pre-eclampsia, cervical lesions and reproductive tract infections. Pregnant women should seek timely medical consultation to determine the cause and treat the cause. Common causes and treatment 1, placenta praevia: placenta praevia bleeding, manifested as painless, no cause of recurrent vaginal bleeding, reduce the amount of activity during vaginal bleeding, pay attention to rest, prohibit anal examination and unnecessary vaginal examination. Observe closely the amount of vaginal bleeding, monitor the intrauterine condition of the fetus, perform ultrasound to confirm the diagnosis, carry out treatment to stop bleeding and suppress contractions under the guidance of the doctor, try to prolong the pregnancy week, and perform emergency surgery if there is heavy bleeding or even shock. 2. Should be appropriate rest, forbidden sexual life. Those with luteal insufficiency can take oral progestin preparations; those with hypothyroidism can take oral small dose thyroid tablets. After treatment, if the vaginal bleeding stops and the ultrasound set indicates that the embryo is alive, the pregnancy can continue. If clinical symptoms worsen, ultrasound examination reveals embryonic dysplasia, blood hCG continues not to rise or fall, and the doctor’s advice indicates that miscarriage is inevitable, the pregnancy should be terminated at a regular hospital; 3. cervical lesions: cervical polyps, such as cervical cancer, can be manifested in the early stage as simple contact bleeding, but no pain. It is necessary to do gynecological examination and cervical cancer screening if necessary to exclude cancer. If there is cervical cancer, appropriate individualized treatment plan should be formulated based on clinical stage, patient’s age, fertility requirements, general condition, medical technology level and equipment conditions, etc.; 4. Reproductive tract infection: including vaginitis causing vaginal wall damage and bleeding, inflammation of reproductive tract causing small local rupture of the cervix and bleeding, all It can be manifested as bleeding but no abdominal pain. It is recommended to pay attention to personal hygiene, enhance immunity, seek medical attention in time and use antibiotics and other medications reasonably under the guidance of a doctor. Key points of health care in the middle of pregnancy 1, systematic prenatal checkups, once a month, including: measuring weight, abdominal circumference, uterine height, blood pressure, checking fetal position, monitoring fetal heartbeat and routine blood and urine tests to understand the health status of the pregnant woman and the growth and development of the fetus; 2, nutritional guidance: women should pay attention to reasonable nutrition after pregnancy to ensure the health of the pregnant woman and the normal development of the fetus; 3, monitoring the growth and development of the fetus : to prevent both fetal growth retardation and too rapid development; 4. Fetal education: pay attention to the regulation and control of the mother’s internal and external environment during pregnancy, maintain physical and mental health, and avoid adverse stimulation. From the fourth month of pregnancy through music, language, touch, etc., actively give the fetus a variety of beneficial information stimulation to promote the physical and mental health and intellectual development of the fetus; 5, gymnastics and exercise for pregnant women: from the middle of pregnancy, two times a day to do gymnastics for pregnant women, can make pregnant women feel relaxed and energetic. Attention All stages of pregnancy, once vaginal bleeding occurs, it is recommended to go to the hospital at the first time to do treatment and health care according to the specific cause. Pregnant women should pay attention to rest and recuperation, pay attention to diet, avoid strenuous activities, prohibit sexual intercourse in the first and second trimesters of pregnancy, and do regular pregnancy checkups.