Clinical studies on the antifertility effect; site of action; pharmacokinetics and toxicity of gossypol, a yellowish pigment occurring in certain species of cotton plant with a reputed contraceptive effect, were first carried out in 1972. Some 4000 Chinese men had used gossypol contraceptive pill for at least 6 months, and some for more than 4 years. Reported efficacy rate of the pill was 99.89
作者：G I, Zatuchni；C K, Osborn
来源：Research frontiers in fertility regulation : RFFR 1981 年 1卷 4期
