患者 ,女 ,2 5岁。主因妊娠 41+ 3 周 ,第1胎 ,腹阵痛 6ｈ入院。平素月经规律 ,Ｇ1Ｐ0 ,孕期顺利。入院查体 :一般情况好 ,心肺无异常 ,胎位胎心好。ＰＶ :阴道通畅 ,宫口开大 8ｃｍ ,胎膜未破 ,儿头棘平。化验血常规、出凝血时间、尿常规、肝功能均正常。入院后 3ｈ自然分娩一 Patient, female, 25 years old. The main reason for pregnancy 41 + 3 weeks, the first child, abdominal pain 6h admission. Normal menstrual regularity, G1P0, pregnancy goes well. Admission examination: the general situation is good, no abnormal heart and lung, fetal position fetal heart good. PV: vaginal patency, cervix open large 8cm, fetal membranes are not broken, the spine was flat. Laboratory blood tests, a coagulation time, urine, liver function are normal. 3h after admission to a natural childbirth