Malposition of Fetus（胎儿胎位不正）

Malposition of the fetus refers to abnormal position of the fetus 30 weeks after pregnancy. The gravida has no subjective symptoms, and a definite diagnosis is made only in the prenatal examination. This disease is usually seen in pluripara or gravida with loose abdominal wall. If it is not timely rectified, dystocia will occur. In Chinese Medicine, it belongs to “abnormal fetal position”. It is caused by deficiency of qi and blood, leading to insufficiency of fetal qi or abnormal development of the fetus, and weakness of uterus in contraction; or by obstruction of qi and blood, leading to the change of fetal position.

孕中期胎兒在宮腔中，有較大的活動範圍，因此經過胎動，會在宮腔中以各種姿勢存在。隨著胎兒增大，孕周增加，到孕末期胎兒逐漸就會以頭朝下臀朝上的姿勢一直等到分娩。當由於子宮細長、臍帶牽拉、羊水原因、胎兒有畸形等，或者母親是經產婦，腹壁鬆弛，胎兒在宮腔活動範圍大，使胎兒出現臀位、橫位等，我們稱為胎位不正。