The role of day 0 and day 4 β-human chorionic gonadotropin values and initial ultrasound findings in predicting the success of methotrexate treatment in ectopic pregnancy.

In addition to the basal β-hCG value, endometrial stripe thickness of ultrasound findings should also be considered in determining patients with a high chance of success in single-dose MTX treatment.β-hCG changes between D0-D4 may be advantageous in the clinical management of ectopic pregnancy for earlier evaluation.