 After this period, the family hosts a ceremony ("machu bu benkyu") between the fourth and twelfth day after birth, during which time the baby is introduced to the father and the rest of the extended family.Congratulations and gifts are accepted and the baby is ceremoniously massaged in mustard oil and its eyes outlined in "gajal" (soot from an oil lamp and butter) to protect its eyes.All food is prepared by other female members of the family or the maid; the mother is not allowed to cook during the postpartum period.