Talk:Estrous cycle

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The google test suggests 'estrus cycle' is preferable to 'estrous cycle', while ,strictly speaking, the corresponding analogue to 'menstrual cycle' is 'estrous cycle'. But so it is.Ekem 18:10, 5 Jun 2005 (UTC)

No it doesn't. Estrous/Oestrous cycle beats estrus/oestrus by 600 000 to 120 000.User:Laven 11:49, 26 Apr 2006 (GST)

The "Google test" is a rough guide when you have no other linguistic determination, but in this case we do. The ending "-ous" is used for adjectives, whereas "-us" is used for nouns. So "estrous" describes the type of cycle relating to the event called "estrus." Compare with "mucous," which describes a membrane that relates to the substance "mucus." Illexsquid (talk) 04:47, 26 October 2009 (UTC)

In find the "zoophile" paragraph to be both irrelevant and inaccurate. Since when is "observer of animal behaviour" an accurate definition of "zoophile"? It certainly does not correspond to the definition on the linked "zoophilia" page. And in what jurisdiction is their "theory itself" illegal?

Does this article's subject concerns humans?[edit]

having read all the article i am unable to find relative information for human females "women". I wanted to know how this cycle is related to periods in women and the common belief that ovulation is strong in this cycle? but this article currently seems to be created to inform vets only. (talk) 15:33, 20 July 2008 (UTC)

This article as of today is quite explicit in that it does not discuss the menstrual cycle, which humans and other apes undergo, but rather the estrous cycle, which is the reproductive cycle experienced by most placental mammals. Well-meaning people seem to keep trying to add information about humans to this article; the article on the menstrual cycle is the appropriate place for that. Illexsquid (talk) 04:42, 26 October 2009 (UTC)

Differences from the menstrual cycle[edit]

The very end of this section states that studies show that women have the most sexual activity just prior to ovulation. Anecdotally from my own experience corroborated from some women I know differs from this statement as does this quote: "One little problem with this theory. Surveys show sex occurs most frequently around the time of menstruation, when women are LEAST fertile. So either the theory is BS, or male cluelessness is more deep-seated than we thought.

  Which is quoted from here

which is used as a refrence here

On one hand I guess my point is that both study findings can't be right but what I was really hoping for was an explanation/justification for why the quote I've placed here (and agree with) would be correct. I'm stumped as to what biological sense this could make except perhaps to actually forestall pregnancy in ancient times until the sexually mature young women were actually a little older and more likely to survive childbirth.--Xiaou 09:36, 22 December 2005 (UTC)xiaou

Here's something I found odd, the article claims that animals that undergo estrus, rather than menstruation, do not expel their unused gonna-be-placenta whatever.. So, what is that that comes out? They sure -seem- to menstruate, which can make a mess if you don't spay or diaper your indoor dog in heat

Estrus Cycle[edit]

The correct spelling when describing the cycle is "estrous" or "oestrous" (the latter commonly is used in the UK). The word estrous is the adjective form of estrus; as it is used to describe the cycle, estrous is the proper spelling. Estrus is a specific phase of the estrous cycle. Source: Pathways to Pregnancy and Parturition by Phillip L. Senger, 1997. 19:19, 15 March 2006 (UTC)

I suggest that the part about the spelling of estrus/estrous/oestrous/oestrus, which is currently in "Differences from the menstrual cycle", be in "Etymology and nomenclature".-- 17:05, 6 July 2006 (UTC)


See Estrus#Frequency -- how precisly are foxes bith polyestrous and diestrous? •Jim62sch• 20:36, 27 April 2007 (UTC)

Mating season[edit]

"Mating season" links here. Where is discussion of mating season? We need this. Fresheneesz 03:43, 31 October 2007 (UTC)

Bird Reproductive Cycles[edit]

There isn't anything on this page about birds and their reproductive cycles. If there is a page devoted to that, I haven't got a clue what it might be called (as noted above, Mating Season, which was the closest and only link I found that might be useful, links here instead).Dusk Raven (talk) 21:24, 7 May 2008 (UTC) !

Birds are not mammals, so there is no reason they would be listed on the page. The page talks about the oestral cycle of mammalian placental females. That includes all mammals except monotremes (as the platypus and the echidna or spiny anteater) and the marsupials or pouched mammals (as kangaroos, opossums, wombats, dasyures as Tasmanian devil, phalangers, and the banded anteater or numbat.Jon (talk) 07:26, 27 June 2009 (UTC)

Alternative Estrus Explanation[edit]

The accepted explanation for the estrus behavior of the female ( "heat") makes no sense.

The only hormone which induces sexual excitement is testosterone. Serum testosterone levels in the estrus female are actually lower than at other times in the fertility cycle.

An alternative explanation for that proactive behavior, in which the female of the species in heat seeks to mate with any proximate male of the species , is in differences in the pelvic floor between species of placental mammals which have estrus and species which do not.

Examining the comparative anatomy of the genital structures of the estrus and non-estrus species shows that the structures in the clitoris are different in one particular; the location of the vestibular bulbs . These bodies are homologous, in gross appearance and in histology, to the bulbous glandis of the penis. In the dog the latter are the prominent bodies which lock the penis in the vagina during coitus.

In the estrus female the vestibular bulbs are located directly against the glans clitoridis . At the beginning of estrus, they are inflated with blood, via a blood supply separate from the rest of the clitoris. This puts pressure on the glans, producing stimulation of the Pathian bodies in that structure. As long as the vestibular bulbs are inflated, the female will experience sexual excitement, even without testosterone.

In women, a non-estrus species, the vestibular bulbs have migrated out of the clitoris and are now along the urethra near to the fossa of that body. No matter how much they may swell during ovulation, they cannot induce sexual excitement by stimulating the glans.

This explanation for the absence of estrus in H.sapiens was probably brought about by a change in the timing of the closing of the pelvic ring at the pelvic (pubic) symphysis. Arne97 (talk) 13:40, 5 April 2009 (UTC)

Specific species[edit]

Why put bovine, ewe, and goat in the same subcategory under this category? The ewe is a female sheep. Goats and sheep are both bovines, as are antelopes (except the pronghorn which is not a true antelope), gorals, serows, bison, buffalo, oxen, and numerous different species, as the musk-ox, chamois, and takin. It would have been sufficient to just put bovine, pig, and elephant in that list, or put in goat and sheep, but leave out bovine.Jon (talk) 07:49, 27 June 2009 (UTC)

mating season redirects here, but there is nothing on mating season[edit]

especially of non-mammallian species. Think of the wikilinkers please! TCO (talk) 18:00, 18 December 2010 (UTC)

Comment removed from article[edit]

The following remark had found its way in the "Differences from the menstrual cycle" section as an HTML comment. Without researching it I can't see how long it's been there, but it looks like a while. It's very difficult to see why it is good to have it in there as a comment, so I am moving it here. I'm sorry that is author remains unknown unless someone wants to do the work. Best wishes DBaK (talk) 08:31, 19 January 2011 (UTC)

Comment from unknown author[edit]

This information does not help me one bit! In addition, there are behavioural changes in women during their fertile period, including increased walking (which is thought to be goal orientated, towards locations of known higher quality males, ie social gatherings etc that are analogous to 'watering holes'), decreased food, salt and water intake (which is thought to be an evolutionary strategy to allow them more time for pair finding), increased skin exposure, and women tend to wear clothes that they perceive to be more sexy). There are also a number of physical changes including: increased voice pitch; increase in gynoid content of breast fat; decreased hip:waist ratio; more attractive 'scent'; more attractive skin; gait changes.

Edit summaries[edit]

Could editors please please try to remember to use edit summaries here? I shouldn't be editing this article at all with my lack of knowledge of biology and I am likely to stop now but at least if editors used edit summaries we'd know what they were driving at and people like me night revert you less readily. Without it, as the Help:Edit summary article says, all sorts of problems are caused. If you make an edit and don't use one I don't think you should be surprised at being reverted, no matter how knowledgeable and correct your edit actually is! Thanks and best wishes DBaK (talk) 08:38, 19 January 2011 (UTC)

Difference between menstrual cycle and estrus cycle?[edit]

What is this exactly? I understand them as the same thing. It does go to say that mammals who have estrus absorb the endometrium and those that menstruate discard it instead, but then it goes to say that humans, that menstruate, go into estrus.