Do female animals have periods?

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Offline Matimu Hlungwani

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Do female animals have periods?
« on: 07/02/2011 15:30:02 »
Matimu Hlungwani  asked the Naked Scientists:
Hi sir, im just curious, do female animals have periods?
Matimu Hlungwani'

What do you think?
« Last Edit: 07/02/2011 15:30:02 by _system »


Offline old_bob

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Do female animals have periods?
« Reply #1 on: 27/02/2011 15:57:39 »
Not sure why no replies, I assume the answer is yes. Periods will only occur in non pregnant female animals so maybe 1 in 500 sheep? Such sheep will be killed by the farmer as not financially viable so the population gets more and more fertile - I guess....


Offline JnA

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Do female animals have periods?
« Reply #2 on: 28/02/2011 06:05:05 »
Yes. All female mammals do** . Though they are not all 'displayed' in the way that humans do. Some mammals reabsorb the uterine lining at the end of the cycle (oestrous).

monotremes are different they lay eggs but do provide some nourishment to the eggs before they are laid.

Female kangaroos have an interesting system. Called diapause, they hold one embryo in a state of suspension, therefore being almost constantly pregnant. This is an adaptation for times of drought or food shortage or if the infant currently occupying the pouch dies. Pretty cool huh?

**(I rarely feel safe stating something categorically, because sure as sugar, someone will show me otherwise :) )