Answer:
(Fatwa: 87/87=M/1429)
It is mustahab to perform aqiqah on seventh day of birth. If missed, one can perform it on any other day he likes, but still it is better to manage it to occur of the seventh day. You can purchase share of aqiqah in the big animal of Qurbani.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
