Accidents that occur during labor are medically known as complications during labor, and commonly include labor arrest, fetal distress, postpartum hemorrhage, and more rarely, uterine rupture, fetal shoulder obstruction and amniotic fluid embolism. The prenatal checkup is when the doctor checks that the pelvis size of the pregnant woman is within the normal range, the fetus is of appropriate size, estimated to be less than 4000 grams or less, and the fetus is in the head position, so that a trial of labor can be performed. If there is any abnormality the doctor will usually advise that further examination is needed after admission to the hospital to determine if natural delivery is possible. Whether the delivery can be successful or not depends on the mother’s good mental preparation and determination before the delivery, and good labor force after the delivery is also needed is contractions. Good labor force during labor makes the opening of the uterus dilate gradually, and the fetal head adapts to the shape of the birth canal in the birth canal and descends gradually. If the fetus is stuck in the pelvis due to poor labor force during labor, it will cause the opening of the uterus to dilate and the fetal head to stop descending, causing labor stagnation, which is called relative cephalopelvic disproportion. The best way to avoid labor arrest is to control the weight before delivery and not to make the fetus too big, so that the fetus is around 3000 grams at full term; to move properly in the delivery room in the early stage of labor and not to be overly nervous; to regulate your breathing when the contractions are tight, not to shout and to replenish enough energy so that there are good and coordinated contractions. Fetal distress occurs 90% of the time during labor. The reasons for fetal distress during labor are the decrease of maternal oxygen, such as maternal agitation during labor, decrease of oxygen inhalation, or uncorrected prenatal anemia; placental and umbilical cord factors, such as decrease of placental function, fetal umbilical cord wrapping around the neck, knotting, etc.; too frequent contractions, decrease of fetal oxygen and carbon dioxide exchange capacity; and fetal factors, such as fetal abnormalities, especially The fetal distress occurs during labor. The clinical diagnosis of fetal distress during labor is mainly based on fetal monitoring, observation of the color and volume of amniotic fluid, and also the collection of fetal blood for blood gas analysis. Whether the fetal cord can be wrapped around the neck or not is a matter of maternal concern. The use of color ultrasound during labor examination can detect most cases of cord wrapping before delivery. If it is long and loose, it has no effect on the fetus. 30% of fetuses will have the umbilical cord wrapped around the neck, and pregnant women need to count the fetal movements carefully before delivery and go to the hospital in time if it is abnormal; after delivery, the delivery can be carried out under close fetal monitoring. Postpartum hemorrhage is a fast and serious complication of childbirth and is one of the leading causes of maternal death in some developing countries. However, most of the factors of postpartum hemorrhage can be done during pregnancy and delivery can do some prevention and health care, and many medical activities of obstetricians are in the prevention and control of postpartum hemorrhage, so that efforts to reduce the occurrence. There are four major causes of postpartum hemorrhage: weak uterine contractions, birth canal injury, placental factors and coagulation disorders. The mother needs regular prenatal checkups to detect some factors that may cause postpartum hemorrhage and comorbidities that may cause hemorrhage and correct them in time; what can be done before delivery is to control the weight, so as to control the fetal weight, too big fetus may cause weak uterine contraction and labor tears during labor, labor tears include cervix, vagina and perineum, generally it is better to control the fetal weight around 3000 grams to facilitate natural It is best to control the weight of the baby to about 3000 grams to facilitate natural delivery. In addition, if you do not plan to get pregnant, you should do a good job of contraception, reduce abortion, and multiple uterine surgery or another pregnancy immediately after surgery, which will cause various lesions of the placenta during delivery, such as placenta praevia, placental adhesions during delivery, placental membranes residue and placental implantation, causing postpartum bleeding. During the second stage of labor, after the doctor disinfects the area and prepares to deliver the baby, you should cooperate with the doctor, try to force when you are told to force, and don’t use force when you are told to puff, so that the fetal head can be delivered slowly from the vagina, which is not easy to cause vaginal and perineal tears; keep your strength during labor, replenish energy, eat and drink, which can strengthen the contraction of the uterus, and after the delivery of the fetus, the doctor gives some drugs to help the contraction of the uterus Prevent bleeding; you should not let your bladder swell after delivery, you should relieve urine in time, after delivery, if your bladder swells, it can also cause poor contraction and lead to postpartum bleeding. Even if there is prevention during the prenatal period and the delivery goes smoothly, some women will still have postpartum hemorrhage. Therefore, women will stay in the delivery room after delivery to observe uterine contractions and vaginal bleeding for 2 hours before they can leave the delivery room and return to the ward. In case of bleeding, it is important to trust that the doctor can take various measures and actively resuscitate the patient. The incidence of accidental uterine rupture during labor is relatively low, especially in pregnant women who have no history of uterine surgery in their first child. Uterine rupture often occurs in women with a history of uterine surgery, including a history of cesarean delivery, a history of uterine fibroid excavation and a history of uterine injury from some abortions and scrapings, which may cause uterine rupture due to possible poor scar healing of the uterus and another pregnancy and delivery, or with uterine malformation and dysplasia that may cause rupture. Pregnant women without the above reasons may have particularly strong contractions during labor and delivery, and the fetal head cannot pass well through the pelvis, and fetal obstruction can cause the lower part of the uterus to become thinner and thinner, leading to rupture. During the prenatal checkup, let the doctor know the history of previous surgeries, regular checkups to check the scar as much as possible through ultrasound, early preparation to choose the delivery method, currently most doctors will choose cesarean delivery before delivery, of course, although there is a history of uterine scars but healing well, and there are no some factors that can not try to deliver, you can also deliver vaginally under close supervision, delivery must be regular hospital with good The delivery must be performed in a regular hospital with good monitoring, so that abnormalities can be detected early and adverse events can be avoided. The occurrence of amniotic fluid embolism is also relatively rare and can occur in any mode of delivery, mainly when amniotic fluid enters the circulating bloodstream through some open blood vessels and life-threatening symptoms such as pulmonary embolism, allergy and blood non-coagulation occur. The entry of amniotic fluid into the blood vessels may be caused by obstetric surgery, or by too strong contractions or sudden rupture of the membranes. Some informal delivery sites and unregulated use of oxytocin cause too strong contractions and amniotic fluid embolism, causing fatal postpartum hemorrhage before being sent to a regular hospital. Fetal shoulder obstructed labor mainly occurs in huge fetuses, mostly in fetuses larger than 4200 grams or more, or in fetuses of pregnant women with uncontrolled gestational diabetes, such fetuses have a small fetal head and a huge fetal body, resulting in delivery of the fetal head while the fetal shoulder is stuck in the pelvis, which can lead to fetal hypoxia or fetal death after a long time, or the doctor can cause neonatal brachial plexus nerve paralysis and injury. If the fetus is huge, or if gestational diabetes is not controlled, a cesarean delivery may be an option after labor. Once shoulder obstruction occurs during labor, cooperate well with the doctor in time, try to open your legs, lean your knees towards your abdomen as much as possible and exclude the fetus by force, which may only avoid fetal injury. Most pregnant women can deliver naturally through their own efforts with the encouragement of their families, confidence and good monitoring by doctors. Most of the causes of accidents during labor can be found during prenatal checkups and observation during labor, some of them can be corrected, some of them can be prevented, and those that cannot be corrected can be chosen as appropriate delivery methods. Therefore, it is necessary to have regular prenatal checkups after pregnancy and to choose a regular hospital for delivery in order to ensure a safe delivery.