Human chorionic gonadotropin levels of cesarean scar pregnancy compared with those of other ectopic pregnancies: a retrospective cohort study

Background

A cesarean scar pregnancy (CSP) is an abnormal implantation of an embryo within a previous cesarean section scar and considered a relatively rare form of ectopic pregnancy. We aimed to clarify the factors associated with CSP and evaluate whether differences in serum human chorionic gonadotropin (hCG) levels according to implantation site could contribute to early detection of CSP.