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1.避孕药物的特点及临床试验的分期避孕药物和绝大多数其他药物不同,它一旦研制成功,将被千百万健康的育龄夫妇长期使用而很少受到医疗监督,因此,对其不良反应及长期安全性的要求远较一般药物为高,而且实际上期望药物具有近乎100%的避孕有效率,加上人群的不均一性,因而要提供一种安全、简便、经济、高效和可逆的避孕药是一项难度很大、要求很高的任务。新避孕药的临床试验一般可分为三期进行:
1. Characteristics of Contraceptives and Staging of Clinical Trials Contrary to most other drugs, contraceptives, once successfully developed, will be used by millions of healthy couples of childbearing age for very long periods of time with little medical supervision and therefore adverse effects on their adverse reactions And long-term safety requirements are far higher than the average drug, and actually expecting the drug to have nearly 100% contraceptive effectiveness, combined with population heterogeneity, to provide a safe, simple, economical, efficient and reversible Birth control pills are a difficult and demanding task. Clinical trials of new birth control pills can generally be divided into three phases: