避孕方法研究信息在编号为避孕２１的课题中，一项国际协作研究正在进行，其目的是为避孕方法发展的研究中增添新的活力。除了强调改善保健服务质量外，还提出应重视下列三个方面的要求：改进阴道避孕的方法，特别是要保护妇女免受性传播疾病的感染；催经止孕法（倾向于每... Information on methods of contraception In the issue of contraception 21, an international collaborative study is underway with the aim of adding new vitality to the development of contraceptive methods. In addition to emphasizing the improvement of the quality of health care services, it is also proposed that the following three aspects should be emphasized: ways to improve vaginal contraception, especially to protect women from sexually transmitted infections;