宫颈在妊娠期间发生一系列组织化学和血液流变学改变如宫颈胶原纤维数目减少，基质中透明反酸盐增加，血管扩张明显等，这些变化使其较易发生水肿。分娩时某些产科异常则是产生宫颈水肿的直接原因。宫颈水肿可致难产。早期发现并及时处理对减少母婴围产期并发症极为重要。l临床 Cervix occurs during pregnancy, a series of histochemical and hemorheological changes such as reduced the number of cervical collagen fibers, the matrix of clear anti-acid salt increased vasodilatation significantly, these changes make it easier to edema. Some obstetric abnormalities during childbirth is the direct cause of cervical edema. Cervical edema can cause dystocia. Early detection and prompt treatment are crucial to reducing complications of maternal and perinatal complications. l clinical