<prompt> Criteria for diagnosis of gestational trophoblastic neoplasia includes all exceptPlateau of serum β-hcG levels for 4 measurements during a period of 3 weeksRise in serum β-hcG levels 10 during 3 weekly consecutive measurementSerum β-hcG levels remain detectable for 3 months onlyHistological evidence of choriocarcinoma  <response>: TABLE 20-3. Criteria for Diagnosis of Gestational Trophoblastic NeoplasiaPlateau of serum β-hcG level 10 percent for four measurements during a period 3 weeks or longer - days 1, 7, 14, 21.Rise of serum β-hcG level 10 percent during three weekly consecutive measurements or longer during a period of 2 weeks or more - days 1, 7, 14.Serum β-hcG level remains detectable for 6 months or moreHistological criteria for choriocarcinoma. 