Polyandry can have 2 meanings:
- Society: A woman marrying multiple men
- Zoology: A female mating multiple males
Human (objectified as animal) is part of both of the above terminologies. Society is more related to mentality and Zoology is more related to physicality.
According to scriptures (MahAbhArata based),
- Multiple "marriages" were Not allowed for women
- Multiple "matings" were acceptable upto 3 for a female, with her male's consent, typically for procreation
During Adi Parva PAndu & Kunti themselves referred the scripture!
Woman should marry to 1 husband
In below highly edited passage, it's explained that Women were allowed in ancient times to choose multiple men for mating. However a Rishi named Uddalaka's son Swetaketu stopped this practice when a Brahman took away his mother for mating. From thereon, it was a custom for Woman to be obedient to her husband. Certain cultures still allowed this practice though. PAndu has also mentioned liberalism of women part, which are removed.
King Pandu well-acquainted with all rules of morality, replied ... But I shall now tell thee about the practices of old indicated by illustrious Rishis, fully acquainted with every rule of morality... women formerly were not immured within houses and dependent on husbands and other relatives. They used to go about freely, enjoying themselves as best as they liked ... they did not then adhere to their husbands faithfully, and yet, O handsome one, they were not regarded sinful, ... The present practice, however (of women's being confined to one husband for life) hath been established but lately. Women transgressing the limits assigned by the Rishi became guilty of slaying the embryo.
Woman can mate upto 3 Men (with husband's consent)
King PAndu allowed both of his wives to mate with various deities for begetting sons. He wanted more from Kunti after 3rd son. She politely asserted him that why she can't go further.
The celebrated Pandu, tempted by the desire of having more children wished to speak again unto his wedded wife (for invoking some other god). But Kunti addressed him, saying, 'The wise do not sanction a fourth delivery even in a season of distress. The woman having intercourse with four different men is called a Swairini (heanton), while she having intercourse with five becometh a harlot. Therefore, O learned one, as thou art well-acquainted with the scripture on this subject, ...
"Swairini (heanton)" means "Unbound" & Harlot means "prostitute".