The place where the deity in a temple is placed (prathishtana) is in english called Sanctum Sanctorum. We refer to it as Garbha Griha. The simple sanskrit meaning of this term is 'Home of the Womb' (Garbha = Womb Griha = Home).
My question: Why is the Sanctum Sanctorum called Garbha Griha?
To maake it amply clear I do not need an opinion based reply, but "A reply substantiated by references to Itihasa Puranas, Vedas, smritis of such sources."