In a discussion with King Ajatasattu, the Buddha compares secular and monastic existence. The householder's life is full of hindrances. It is a dusty path . . . The homeless wanderer lives an uncluttered life. The Theravada tradition of women's ordination was broken in the 5th century C.E. , and although women today can take the robes and live a monastic existence, they may not participate fully in the formal affairs of the Sangha.
Ordination takes place in two stages.
Ordination is a simple process, and return to lay existence involves no dishonour, many men become monks for short periods. This happens twice a month at the new full moon. This is usually the time when intensive meditation or study is pursued.