Spontaneous resolution of ectopic pregnancy.

Fourteen patients with ampullary tubal pregnancy confirmed by laparoscopy were initially managed conservatively. Serum human chorionic gonadotropin (hCG) levels were measured daily and strict clinical monitoring performed. In nine patients (64%), the tubal pregnancy spontaneously resolved. In four cases (29%), surgery was ultimately necessary. One patient with a coexistent intra- and extrauterine pregnancy was also successfully managed conservatively. There was a high probability of spontaneous resolution of the pregnancy when the serum hCG level at diagnosis was less than 1000 mIU/mL. Hysterosalpingography was performed after the spontaneous resolution of the tubal pregnancies. Tubal patency was demonstrated in all six patients, and three are currently pregnant. We conclude that conservative therapy allows spontaneous resolution of certain types of ectopic pregnancy.