The Buddha taught that women are just as capable as men of reaching enlightenment. Although at the beginning he refused to allow Mahapajapati to go forth to the homeless life, when questioned by Ananda whether women were capable of realizing the results of their practice, the Buddha replied that that they were capable:
Ananda: "Lord, are women capable, after going forth from the home unto the homeless life under the Norm-Discipline set forth by the Tathagata, - are they capable of realizing the Fruit of Stream-winning, of Once-returning, of Never-returning, of Arahantship?"
The Buddha: "Women are capable... of doing so, Ananda."
It is worthy of note that after Mahapajapati had taken the eight vows laid down by the Buddha and became fully ordained, the Buddha said to Ananda that "if women had not been permitted to go forth from the home unto the homeless life... then would the righteous life last long, the Good Norm would last, Ananda, a thousand years. But now, Ananda, since women have been permitted to go forth from the home unto the homeless life ... not for long will the righteous life prevail; only for five hundred years, Ananda, will the Good Norm stand fast." (Vinaya, ii. x)
After the Buddha's death, the Order charged Ananda with the offence, among others, of introducing women to the order and so causing its decay.
Thus, to prevent the order from degenerating, the Buddha had proclaimed the eight important rules which are not to be broken as long as one lives.