Ricin and the mixture of ricin and castor bean extract respectively showed 100% antiearly pregnancy,while castor bean extract showed 100% anti-implantation.

• 蓖麻蛋白及其与蓖麻油的混合物在抗早孕方面的效果均可达到100%25,蓖麻油抗着床的效果也可达到100%25。