How is the estate distributed for a man who died leaving a pregnant wife and two parents, then his father died after him, and the wife gave birth to a male child, considering there is a sister of the deceased and a brother of his deceased father?

The method of inheritance distribution cannot be clarified until the heirs are definitively and unambiguously identified via the dedicated link.

If the matter is limited to the aforementioned heirs, the inheritance is divided as follows: - The mother receives one-sixth as a prescribed share (fard), and the father receives one-sixth as a prescribed share, due to the presence of a descendant heir, as Allah Almighty says: "And for his parents, each of them the sixth of what he left if he had a child." {An-Nisa:11}. - The wife receives one-eighth as a prescribed share due to the presence of a descendant heir, as Allah Almighty says: "But if you have a child, then for them [the wives] is one-eighth of what you leave, after any bequest you [may have] made or debt." {An-Nisa:12}. - The remainder of the inheritance is taken by the male son by way of 'asaba (residuary heir), based on the saying of the Prophet, peace and blessings be upon him: "Give the prescribed shares to those entitled to them, and whatever remains is for the closest male heir." - The deceased's sister and paternal uncle are excluded by the son.

Thus, the estate is divided into 24 shares: the father receives 4 shares, the mother receives 4 shares, the wife receives 3 shares, and the son receives 13 shares.

The share of the deceased's father, who died after him, along with all his estate, is to be divided among his heirs according to Islamic law in a separate matter pertaining to him.

It must be noted that matters of inheritance are complex and critical. It is safer to refer the case to Sharia courts or consult scholars to ensure the identification of heirs and the presence of wills, debts, or other rights that take precedence over the rights of the heirs.