Usual causes of ectopic pregnancy:

Pelvic cavity troublesome:

congenital reason: pelvic cavity stagnated blood, pelvic deformation. 

Acquired causes: pelvic cavity tubercle, previous surgery in the pelvic area, endometriosis,.

Tubal problem 

             
congenital reason :accessory fallopian tube, tubal appendix vesiculosa, dysfunctional fimbriated extremity.
             
Acquired causes: inflammation of the fallopian tube, tubal adhesions or blocked.

Uterine abnormality: 
            
Congenital reason: uterus septum, unicornuate uterus, bicornuate uterus, rudimentary horn of uterus, infantile uterus.
            
Acquired predisposition: submucous myoma, intrauterine polyp, intrauterine adhesions, intrauterine contraceptive ring。

Other reasons: endocrine disturbance, overstress, zygote transmigration

Treatment

Laporoscopy is an operative procedure which requires hospitalization and is done under general anesthesia. It requires that you are  admitted on the morning of the procedure, not having eaten or drunk from midnight of that day.

In the operating room, an intravenous infusion is started and the anesthesiologist then gives you a general anesthetic. Once you are asleep the gynecologist distends your abdomen with carbon dioxide gas which allows him to pass a viewing instrument (laporoscope) through a tiny incision in your umbilicus. additional probes are placed through small puncture wounds (at the pubic hair line) to help the doctor to move your organs for better inspection and to assist in removing the pregnancy from tube. The stitches do not require removal, and the scar is in the umbilicus.