Antifertility experiments have been made on mice for short-term and long-term observation with castor bean extract and ricin,and which showed apparent effects of antifertility.

利用取物对昆明种小鼠进行了短期与长期的抗生育实验,研究发现取物(油和蛋白)对小鼠有明显的抗生育作用。