Estrous cycle

The estrus cycle (also oestrus cycle; derived from Latin oestrus and originally from Greek οἶστρος meaning sexual desire) comprises the recurring physiologic changes that are induced by reproductive hormones in most mammalian therian females. Estrus cycles start after sexual maturity in females and are interrupted by anestrous phases or pregnancies. Typically, estrus cycles continue until death. Some animals may display bloody vaginal discharge, often mistaken for menstruation, also called a "period".

Differences from the menstrual cycle

Mammals share the same reproductive system, including the regulatory hypothalamic system that releases gonadotropin releasing hormone in pulses, the pituitary that secretes follicle stimulating hormone and luteinizing hormone, and the ovary itself that releases sex hormones including estrogens and progesterone.

However, species vary significantly in the detailed functioning. One difference is that animals that have estrous cycles reabsorb the endometrium if conception does not occur during that cycle. Animals that have menstrual cycles shed the endometrium through menstruation instead. Another difference is sexual activity. In species with estrous cycles, females are generally only sexually active during the estrus phase of their cycle (see below for an explanation of the different phases in an estrous cycle). This is also referred to as being "in heat". In contrast, females of species with menstrual cycles can be sexually active at any time in their cycle, even when they are not about to ovulate.

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The Spider

by: Belle Stars

If you got all the answers
You know just what to say
You suck them into your web like a spider hunting prey
Being happy with their playmate, they don't wander off their faith
But them happy little suckers were just the spider's bait
Yes, you've got the answers
You know just what it takes
Yes this spider is out to get you
??? Break you 'till the mock and bray???
I hope this spider gets you and take you to her layer
But what's the use in telling you
Why should I really care?
There's been many more before you
Tiny, open up your eyes
Her charming ways are many fold
Why should they all be lies?
Yes, you've got the answers
You know just what it takes
Yes this spider is out to get you
??? Break you 'till the mock and bray???
This Tiny's on your side
And if she goes away then it wasn't really worth it
She's a hunter hunting prey
And the spider's never happy
The spider's always there
If the spider gets what she wants then why should she even care
Yes, you've got the answers
You know just what it takes
Yes this spider is out to get you
??? Break you 'till the mock and bray???
Yes, you've got the answers
You know just what it takes
Yes this spider is out to get you
??? Break you 'till the mock and bray???
Yes, you've got the answers
You know just what it takes
Yes this spider is out to get you




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