The implementation of the new policy of “two children” has given hope to many single families who want to have two children. The annual increase of 1~2 million children’s birth rate makes the obstetrics departments of hospitals continue to usher in a new peak, summarizing the obvious Chinese characteristics: the post-70s is a group of people rushing to the last train to give birth to a second child, they are generally old, with many complications, the age span between second births is large, with an average interval of 8-10 years; the post-80s is the one-child generation, characterized by a high rate of cesarean section; and the post-90s is the birth of a group of people in their prime years. high rate of cesarean section; and the post-90s are the cohort in their childbearing years. Recently, as an obstetrician, I can clearly feel the spurt in the number of elderly women in labor. This wave of “climax” has brought a series of problems that both pregnant women and obstetricians are facing new challenges, and it is not easy for super-aged women over 40 years old to conceive a second child, partly due to the rapid development of assisted reproduction technology in recent years, which has compensated for the decrease in the natural fertility rate to a certain extent, and many women of advanced age have the desire to have another child. Many elderly women who are pregnant have the desire to have another child, but in order to catch up with the limited number of pregnancies, they often use in vitro fertilization (IVF) to conceive, and undergo fertility preservation treatments in the early stages of pregnancy, coupled with too little exercise during pregnancy, which pose greater risks during and after delivery. For example, weak uterine contractions during labor and delivery, placental adhesions leading to uncontrollable postpartum hemorrhage, and the occurrence of postpartum venous embolism. The compensatory capacity and stress capacity of these elderly women are far lower than that of young primigravid women, and it is very tricky to resuscitate them in case of comorbidities or complications. There has been a large increase in the percentage of deaths among elderly PMS women in recent years, and they are often at greater risk when going through labor. Caused by the causes of difficult labor for older women, the most prominent problem is still obesity First of all, this group of people tend to live in better conditions, and secondly, the second pregnancy checkups are not as important as the first child, regardless of obstetricians every time I urged, as usual, excess nutrition, too little exercise, obesity not only produces a huge child, and then also brought gestational diabetes, gestational hypertension and other comorbidities. To the start of labor, subjectively, these pregnant women because of previous delivery experience, even if they already know that the fetus weight is large also want to choose vaginal delivery. In reality, the time span between two deliveries, the relative age of the mother, and the fact that she is not as physically strong and fit as she used to be, can easily lead to obstructed labor. There are also some objective interfering factors, such as the looseness of the abdominal wall of the mother, so that the doctor is unable to estimate the weight of the fetus, and often considers a huge baby as a normal-weight baby, and thus decides to deliver the baby vaginally, and is ultimately caught off-guard. Sometimes it is hard to convince a fat mother to agree to a cesarean section, but the problem of anesthesia during surgery for an obese pregnant woman is another difficulty, and the problem of postoperative incision healing is even more troublesome. Secondly, the life experience of elderly women is relatively rich In the previous family planning policy, some experienced abortion, induction of labor, removal of the uterus and other operations, some have had the experience of banding, removal of the ring and other experiences, as well as infected with gynecological inflammatory diseases, as well as received cervicitis physical therapy, which may cause the physiological condition of the uterus to change, and such a change is likely to affect the normal delivery, resulting in obstructed labor. There are also some rare cases, such as the occasional double uterus and double cervix, where the last conception was in the opposite uterus and the cervix of the uterus of the current conception is poorly developed, and obstructed labor occurs. For another group of mothers who had a cesarean section in their first pregnancy and plan to have another cesarean section in their second pregnancy, placenta praevia and the risk of perioperative hemorrhage are the obstetrician’s biggest headache Pregnant women with a history of cesarean section are susceptible to the combination of placenta praevia due to the endometrial damage brought about by the previous surgery, coupled with the fact that many older women who give birth again have experienced abortions as well as surgeries such as placing and removing the IUD, which has resulted in repeated damage to the lining of the uterus causing endometritis or atrophic Insufficient blood supply to the placenta, in order to take in enough nutrients, the area of the placenta expands and extends to the lower part of the uterus, which increases the incidence of placenta praevia and abnormal placenta morphology. In recent years, placental factors have gradually replaced contraction weakness as the main cause of severe postpartum hemorrhage, and it is also the primary cause of hysterectomy. Due to the weakening of the body functions, the tolerance to hemorrhage is reduced, which can easily lead to diffuse coagulation dysfunction, hemorrhagic shock, hysterectomy and other serious consequences. Even if it is hard to give birth to the baby, obstetricians still dare not relax. First of all, it is because of postpartum hemorrhage The incidence of postpartum hemorrhage in elderly PMS women is 6.3 times higher than that of young PMS women. There are many reasons for this, such as the high mental tension of elderly PMS women, high physical exertion during labor, multiple pregnancies and births, severe damage to the uterine muscle fibers, cervical and birth canal lacerations, as well as the previously mentioned placental factors, which can all affect uterine contraction and retraction function, thus causing postpartum hemorrhage. Secondly, postpartum venous thrombosis of the lower extremities is also a relatively high incidence of disease in women of advanced maternal age. This is because during the puerperium after pregnancy, labor and cesarean section, the enlarged uterus presses on the inferior vena cava, the pelvic veins dilate and the blood flow is slow, coupled with a long period of time lying in bed, which contributes to the formation of thrombus. Once the patient gets out of bed, especially during defecation, muscle contraction of the lower limbs and abdominal muscle exertion can dislodge the thrombus into the arteries of the lungs, brain, heart, and other organs, where thromboembolism occurs, which can lead to sudden death in severe cases.