Also if the birth of a child is found out after ten days then Sutak need not be observed. In Parashar Madhav, Deval explains, ‘In birth Sutak, once the days of Sutak have passed, one need not observe Sutak.’ This is not the case with Sutak of death though. Vrudh Vaishista explains, ‘If one finds out about the death after six months, then Pakshini should be observed. If after nine months then one day and if more, then one needs only to bathe to purify themselves.’ https://www.swaminarayan.faith/scriptures/en/shikshapatri/general_dharmas_for_all_followers/88