How is the estate of a man who left behind two sons, two daughters, two wives (one of whom is pregnant), and three full sisters distributed?

If the deceased leaves behind only his two wives, sons, daughters, and a fetus, then the two wives receive one-eighth (of the inheritance), and the remainder goes to the sons, daughters, and the fetus by ta'sib (residuary inheritance), with the male receiving the share of two females. The full sisters are completely excluded by the son. The most favorable share is set aside for the fetus, and the inheritance is distributed after the status of the fetus becomes clear (male, female, stillborn, two males, two females, or a male and a female), according to the detailed shares mentioned.