In many polygynous marriages the husband's wives may live in separate households Polyandry is the practice wherein a woman has more than one husband at the same time.
Polyandry is much less popular than polygyny and is illegal in virtually every state in the world. Polyandry is believed to be more likely in societies with scarce environmental resources, as it is believed to limit human population growth and enhance child survival.
In sociobiology and zoology, researchers use polygamy in a broad sense to mean any form of multiple mating.
Polygamy is widely accepted among different societies worldwide.
In such cases, the deceased man's heir may inherit his assets and wife; or, more usually, his brothers may marry the widow.