血栓性外痔和肛裂在围产期常见 ,也是孕妇围产期主要的不适之一。然而 ,这些疾病具体的发病率尚不清楚。本研究的目的是估计分娩期此类疾病的发病率和其发病危险因子。作者在病人知情同意的情况下对连续分布的 16 5例孕妇在分娩前 3个月和分娩后 2个月期间进行了直肠检查。研究 Thrombotic external hemorrhoids and anal fissures in the perinatal common, but also one of the major maternal perinatal discomfort. However, the exact incidence of these diseases is not clear. The purpose of this study was to estimate the morbidity and risk factors for such diseases during labor. The authors conducted a rectal examination of 165 consecutive pregnant women 3 months before delivery and 2 months after delivery with the patient’s informed consent. the study