I. Advantages of labor analgesia 1. Reduce or relieve labor pain, reduce the body’s stress reaction, and help the mother successfully complete the labor process. 2, less blockage of motor nerves, does not affect the voluntary activities of the mother. Eliminate the acid-base disorder caused by over-ventilation of labor pain and maintain the balance of the body. 4.It can flexibly provide anesthesia for forceps delivery or cesarean section according to the needs of labor progress. 5. The whole analgesic process is supervised by specialized personnel to ensure the safety of mother and baby. Adverse reactions and accidents that may occur in labor analgesia 1, allergic (or hypersensitive) reaction to anesthesia drugs or toxic reaction to local anesthetics. 2, position change may lead to supine syndrome, the resulting hypotension can be corrected by changing the position or using blood pressure-raising drugs. 3.Difficulty in breathing due to uterine compression of the diaphragm can be relieved by adjusting the position, oxygenation and assisted breathing. 4, in a few patients labor analgesia may cause lower limb weakness, numbness, nausea and vomiting, skin scratching and so on. Third, the possible complications of puncture 1, nerve injury. 2.Low back pain, headache and urinary retention. 3.Local hematoma and injury. Influence on the course of labor Due to cephalopelvic disproportion, abnormal fetal position or the effect of analgesic drugs, a few mothers may experience prolonged labor and increased rate of assisted delivery. Other 1. Pregnant women may not be suitable for labor analgesia due to their own conditions, such as blood and coagulation problems, trauma and injury at the puncture site or inflammation and deformity at the puncture site, etc., and the doctor may not recommend labor analgesia for them. 2.Obstetric analgesia is a self-pay program and is not covered by any insurance. 3.Pre-operative examinations are necessary, which requires a good blood test before admission to the hospital, especially coagulation function, blood routine and so on. 4, labor analgesia is voluntary, usually by the patient first application. 5, should inform the doctor of the pregnant woman’s past medical history, surgical history. 6, specific detailed matters, the anesthesiologist will also have a signed conversation before the operation.