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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Criteria for diagnosis of gestational trophoblastic neoplasia includes all except
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The correct answer is  TABLE 20-3. Criteria for Diagnosis of Gestational Trophoblastic Neoplasia

Plateau 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 more
Histological criteria for choriocarcinoma.