The combined use of transvaginal ultrasound and serial quantitative de
termination of the serum human chorionic gonadotropin (HCG) concentrat
ion offers an early and exact diagnosis of an ectopic pregnancy before
the onset of clinical symptoms. Therefore, a large variety of invasiv
e and noninvasive treatment options can be chosen. In patients without
severe clinical symptoms, the trophoblast activity should be determin
ed via the HCG course before invasive treatment methods are performed,
because a considerable proportion part of the patients show spontaneo
us resolution of the ectopic pregnancy without further measures. Recen
tly systemic treatment with methotrexate alone or local injection of d
ifferent substances like prostaglandins, glucose, and methotrexate, et
c. became an alternative to surgical therapy, i.e., endoscopic salping
otomy or salpingectomy. The success rates are generally lower in compa
rison to surgical therapy. Therefore, medical treatment is useful only
in patients with a low trophoblast activity (e.g., <2,500 mIU/ml HCG)
. However, in cases with low HCG values, observation alone frequently
leads to a resolution. Corresponding to the data being available up to
now, the postoperative pregnancy rate does not depend on this decisio
n.