As the women of the world have shared with Indra one quarter sin of the Brahmhatya committed by him, that share of sin in women appears every month in the form of menstruation. This should not be kept secret. Such woman in menstruation, should not join domestic chores, and should not touch others. The touch of a woman in her menstruation period attracts sin of killing a brahmin. Shrimad Bhagwat has said,' women have accepted that share of sin with a carnal desire and therefore it appears in every woman every month in the form of menstruation. Therefore, touching utensils and other domestic objects during such period attracts major calamity. More details on this can be had from famous religious story of "Rushi Panchami Katha."