1病因输卵管妊娠的发生部位以壶腹部最多,其次为峡部,伞部及间质部最少见。(1)输卵管炎症:输卵管黏膜炎使黏膜褶皱粘连使官腔狭窄,甚至堵塞管腔,也会形成输卵管扭曲,狭窄,管壁蠕动减弱,影响受精卵的运行。(2)输卵管发育不良或功能异常,如过去肌层发育差,黏膜纤毛缺乏,雌孕激素调节失败及精神因素等。(3)宫内节育器放置和输卵手术,盆腔内肿瘤的压迫或牵引,使顺暖 1 causes Tubal pregnancy occurred in the most parts of the ampulla, followed by the isthmus, umbrella and interstitial seldom seen. (1) tubal inflammation: tubal mucositis fold mucosal folds so that the bureaucratic stenosis, or even plug the lumen, will form a twisted, narrow tubal wall weakened, affecting the operation of fertilized eggs. (2) tubal dysplasia or dysfunction, such as the poor muscular layer in the past, the lack of mucociliary, estrogen and progesterone failed to adjust and mental factors. (3) IUD placement and ovulation surgery, pelvic tumor oppression or traction, so warm