Cesarean scar pregnancy (CSP)is one of the more serious complications of pregnancies that occur after a prior cesarean delivery. No clinical guidelines have been issued for the management of CSP. More than 30 treatment methods are reported to be used in managing CSP. However, which management can achieve better clinical effects remains unknown. Therefore, this prospective study is designed to compare the outcome between MTX + transvaginal surgery and UAE + D&C in the treatment of CSP.