Even when the Nandikarma is performed, one should not procccd with upanayana if there is a fall of meteors, and showers of fire, or ifthe mother of the boy enters then into her menstrual course. If these events take place after the initial ceremonial meal of the Brahmacharins, the upanayana should not be stopped. The same principle applies to the marriage of the daughter, The father by himself should not give his daughter in marriage. When the mother is dead, the father can perform the upanayana, if he is free from any pollution.