产道是胎儿娩出的通道,在分娩三大因素中占重要地位,特别是骨产道的大小与形态能否适应胎儿是决定分娩顺利与否的关键。骨盆某个径线或某几个径线过短,骨盆形状异常,下肢、髋关节、脊柱病变影响骨盆发育,骨盆骨折或肿瘤以及代谢性疾病引起的骨盆病变,均可致使骨产道异常。骨产 Birth canal is the passage of the fetus, which plays an important role in the three factors of childbirth. In particular, whether the size and shape of the bone canal can adapt to the fetus is the key to decide whether the delivery is smooth or not. A certain diameter of the pelvis or a few radial lines, pelvic anomalies, lower extremities, hip, spinal lesions affect pelvic development, pelvic fractures or tumors and metabolic diseases caused by pelvic lesions, can cause abnormalities in the birth canal. Bone production