if a baby less than 2 years old died -- u ned to burry - should not burn

 Yajur vedha aapasthamba sutram apara karyam continues;Anthyeshti;

Dead child coming from uterus should be burried. no samskaarams. upto and end of 24 months if the baby expired it should be burried. no samskaarams. from third year upto upanayanam if the boy expired cremation in fire. Ekaarcha vidhi samskaram;and also for girls before marriage. for boys after upanayanam expired paithru medhika samskaram. for girls after marriage expired paithru medhika samskaram.

You can do Brahma medha samskaram for the expired person if the person had vedha adhyaayanam and had anushtaanam daily and with acharya sthaanam. For ladies there is no Brahma medha samskaram. If you do paithrumedhika samskaram in the prescribed maaner the dead person in his rebirth will get good rebirth or no rebirth according to his sins and punyah. The dead person will get brahma saayujyam if you do brahma medha samskaram .

Sins done by wife will go to her husband. husband's sin will never go to his wife. punyah done husband 50% will go to his wife. punyah by wife wil never go her husband. Sins done by children will go to their parents.

https://periva.proboards.com/thread/13793/anthyesty-anthim-karyams