Many dangerous situations during pregnancy usually have a warning, which requires the mother and father-to-be to come together to pay careful attention to the danger signals transmitted by the fetus. I. Danger Signal 1: Vaginal bleeding Potential danger: ectopic pregnancy, pre-eclampsia, placental abruption In the early stages of pregnancy, ultrasound examination should be done in time to determine the location of the fertilized egg, if a small amount of vaginal bleeding is found, you should be alert to the possibility of ectopic pregnancy, mothers-to-be with tubal inflammation are more likely to have ectopic pregnancy and should be extra careful; but at the same time, vaginal bleeding is also one of the main symptoms of pre-eclampsia; if bleeding If the bleeding occurs in late pregnancy, you should seek medical attention because placental abruption usually leads to sudden and heavy vaginal bleeding, endangering the safety of mother and child. The potential danger: pre-eclampsia, ectopic pregnancy In the course of pregnancy, pregnant women will feel a slight abdominal pain at some stage, and this condition is mostly normal. However, if the abdominal pain is sudden and spasmodic, this needs to be taken seriously. In early pregnancy, severe lower abdominal pain accompanied by vaginal bleeding may be a warning of ectopic pregnancy or preterm miscarriage. In the case of ectopic pregnancy, abdominal bleeding will cause a strong pain like tearing; in the case of pre-eclampsia, the pregnant woman will have a distinct feeling of falling in her abdomen, the pain is not very intense and usually accompanied by vaginal bleeding. Once the above symptoms appear, pregnant women need to go to the hospital in a timely manner. Potential danger: intrahepatic cholestasis during pregnancy Throughout pregnancy, pregnant women may experience many symptoms, and itching is one of them. If there is widespread itching all over the body, especially in the abdomen, palms and toes, accompanied by mild jaundice, elevated bile acid in the serum and elevated GPT in the liver function test, intrahepatic cholestasis during pregnancy should be highly suspected, which is likely to cause premature rupture of fetal membranes, premature birth, stillbirth and postpartum hemorrhage. Treatment. Potential danger: gestational hypertension syndrome The so-called gestational hypertension syndrome refers to the development of hypertension, proteinuria and edema in the course of pregnancy. Symptoms of hypertension usually begin to appear around 20 weeks of pregnancy, and the incidence of hypertension in older first-time mothers is about five times higher than in younger first-time mothers. This symptom usually causes blurred consciousness, enlarged liver, abnormal liver function, etc. It also leads to intrauterine growth retardation and higher fetal malformation rate, which threaten the lives of mothers and babies, so such pregnant women should pay special attention during pregnancy. The potential danger: fetal hypoxia Pregnant women can count the fetal movements for one hour every morning, midday and evening from the 18th week of pregnancy until delivery, and add up the number of fetal movements in the morning, midday and evening, and then multiply it by 4, which is the number of fetal movements in 12 hours. The normal number of fetal movements per hour ≥ 3 times or ≥ 30 times / 12 hours indicates that the fetus is in good condition, ≤ 20 times / 12 hours or < 3 times / hour, means that the fetus has intrauterine hypoxia may, if the fetal movement < 10 times / 12 hours, indicating that the fetus is at risk, should immediately go to the hospital for examination and treatment. 6. danger signal 6: abnormal uterine height Potential danger: intrauterine growth retardation, huge baby Monitoring the height of the fundus can determine whether the fetal size is normal. If the growth rate is significantly less than the above standard, intrauterine fetal growth retardation should be suspected. If the uterus is significantly larger than the month of menopause should be considered huge children, multiple births, excessive amniotic fluid, etc. The potential danger: abnormal fetal development Amniotic fluid is one of the elements that sustain the life of the fetus, too much or too little amniotic fluid may be a warning sign of fetal pathology. Excessive amniotic fluid may indicate abnormalities in the central nervous system and cardiovascular system of the fetus; if the amniotic fluid is less than 300 ml, it is called low amniotic fluid and may indicate incomplete development of the fetal kidneys or lungs. However, if you find out that your amniotic fluid is abnormal, you don't have to panic, you can monitor it regularly and it may return to normal after a period of time.