Curettage, for the second time, has been performed almost routinely for patients after the first curettage for hydatidiform mole. Is it necessary? The histopathologic results of the second curettage specimens were investigated. It showed that residual molar tissue was found in only 3.3% of the second curettage specimens. So in our opinion, a second curettage, which will not only add to patients' suffering but also would prolong hospitalization time, should be performed only in cases strongly indicated.