Simantonnayana (Sanskrit: सीमन्तोन्नयन, Sīmantonnayana) (literally: parting the hair) is the third of the 16 saṃskāras (sacraments, rites of passage) in the ancient texts of Hinduism. It is observed in the last trimester of pregnancy to wish for safe delivery and is similar to a baby shower. The authorities are not unanimous whether this saṃskāra should be performed for the first child or it should be performed for every child.