If a person (passed away and) left behind sons, daughters and a tumtum (a person of unknown gender); when the estate is large, the males push away the tumtum to (be classified as one of) the females (without receiving a portion).

If the estate is small, the females push away the tumtum to (be classified as one of) the males (without being sustained from the estate).

If a person says, "If my wife gives birth to a boy, he should receive a gift of a mana (100 zuz)''; if she does give birth to a boy, he receives a mana.

If he said, "If she will have a girl, she should receive a gift of 2 mana''; if she does give birth to a girl, she receives 2 mana.

If he said, "If it is a boy, he should receive a mana and if it is a girl, she should receive 2 mana''; if she had twins, a boy and a girl, the boy receives a mana and the girl receives 2 mana. If she had a tumtum, it does not receive anything.

If he said, "Whatever my wife gives birth to, it should receive'', it receives. And if it is the only inheritor, it inherits everything.

(Gemara) - Beraisa: If a person says, "The one who informs me that my wife had a boy will receive 200'' - if she had a boy, he takes 200. "If it is a girl, he should he receive 100'' - if it is a girl, he takes 100. If she had twins - a boy and a girl, he only receives 100.

R. Mana: (In explaining the last case of the Beraisa) - The company of the twin girl reduces the joy of having a boy.