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Why do women have periods when most animals don't?

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51–60 of 68 posts

Re: Why do women have periods when most animals don't?

#51
post #23

Earlier quoted context omitted.

> To non-native speakers: apostrophes are for possession, not plural. It's not so easy. it's = contraction of it is or it has its = possessive form of it

I've never seen "it has" written "it's". Or maybe I didn't understand those correctly.

[deleted]

Re: Why do women have periods when most animals don't?

#52
post #39
post #34

Earlier quoted context omitted.

It's not in the control of the conscious mind. It is controlled by the body (or, you might say, by an evolutionary adaptation instantiated in the linkages of hormonal pathways in the brain.) Note that miscarriage and spontaneous abortion are separate things. Miscarriage happens because the foetus dies in the womb, or the womb is ruptured, and the mother's body detects this. Any other cause is spontaneous abortion—eff…

That is a poor explanation given that extreme stress is known to have all sorts of physiological effects and is noted to negatively effect reproductive success in numerous species. But not all those species menstruate as noted by the article.

The thing muddying the water with stress, is that most things that trigger stress are also bad for the body, and thus for foetal development. Making rats run until they collapse from exhaustion might cause miscarriage, but it's unclear whether that is due to stress-hormone-induced spontaneous abortion, or due to the mother's body using up some micronutrient necessary for the foetus, thus causing a developmental defect which either kills the foetus or stalls its metabolism enough to be detected.

I'm unaware of whether there has been the study of the effects of purely psychological (or synthetic, using injected epinephrine) stress on spontaneous abortion rates.

It's much clearer with fear, though; things that cause a fear response don't tend to harm you (in fact, in an adaptive environment, to the degree that a fear response is created, you tend to avoid harm you would otherwise succumb to) but do trigger spontaneous abortion anyway. This would be much simpler to prove/disprove a purely-hormonal effect.

Re: Why do women have periods when most animals don't?

#53
post #23

Earlier quoted context omitted.

> To non-native speakers: apostrophes are for possession, not plural. It's not so easy. it's = contraction of it is or it has its = possessive form of it

I've never seen "it has" written "it's". Or maybe I didn't understand those correctly.

It's common for en_GB, I can't speak for en_US though. Here[0] is a test with it used twice.

[0] http://www.bristol.ac.uk/arts/exercises/grammar/grammar_tuto...

Re: Why do women have periods when most animals don't?

#54

Earlier quoted context omitted.

> To non-native speakers: apostrophes are for possession, not plural. You could easily repeat that for plenty of native speakers. It's one of the most common mistakes in written English.

Isn't it sad? It's such a frustrating mistake. There's a bar that we drive past frequently that does it with everything. They're "Now accepting application's" and their "Burger's are $2" Sad.

[deleted]

Re: Why do women have periods when most animals don't?

#55
post #23

Earlier quoted context omitted.

> To non-native speakers: apostrophes are for possession, not plural. It's not so easy. it's = contraction of it is or it has its = possessive form of it

I've never seen "it has" written "it's". Or maybe I didn't understand those correctly.

"It's" for "it has" is much more common in spoken English than written (even moreso than is explained by the fact that contractions are generally avoided in formal writing.)

But it is a real thing.

Re: Why do women have periods when most animals don't?

#56
post #50
post #29

Earlier quoted context omitted.

You should understand that "my mom" and "my grandmother" are commonly used to denote technical illiteracy/incompetence and inability to keep up with the latest technological advances. This usage remans an unchallenged bastion of both sexism AND ageism -- a double whammy! Proper usage: * This app is so easy, my mom could use it! * This article is easy to follow and avoids too much jargon -- my grandma would even under…

You should understand that jacquesm made a pretty sweet joke.

Jacquesm indeed made a sweet joke. No, he wasn't the one who used the "my grandma" line. It was the person he was replying to, who wrote:

> HN lately reads like newsclippings sent to me by my grandma

which continues to propagate the insidious, ageist and sexist assertion that older women don't get high technology.

Re: Why do women have periods when most animals don't?

#57
post #8

tl;dr: What we know for sure: foetuses produce hormones to keep the endometrial tissue from thinning. Once a zygote has implanted, the mother's hormones are thus no longer in control of whether her uterus will support its growth or not. Menstruation, when it happens, forcefully cleans out implanted zygotes, returning the uterine hormonal balance to normal. What we guess that that implies: menstruation is a side-effec…

I suspect it's more a matter of ejecting poorly implanted zygotes—implanted enough to get some nutrients, but not enough to overtake the mother's hormonal balance. A poor implant could grow for a period of time before ultimately failing, fomenting a much more dangerous (for the mother) situation later in the term.

Re: Why do women have periods when most animals don't?

#58
post #36

Earlier quoted context omitted.

Isn't it sad? It's such a frustrating mistake. There's a bar that we drive past frequently that does it with everything. They're "Now accepting application's" and their "Burger's are $2" Sad.

Since I moved to Missouri, I've been upset by a similar grammatical error: quotation marks used for emphasis. You would expect, say, all-capitals or an underline or italics, but you instead see 'Come taste the "best" burger in Missouri,' which is awful. In New York, where I grew up, that use of quotation marks is called "scare quotes": quotation marks in all cases signal that you're detaching a text fragment from its…

This is a common practice in signs. It's wrong in literary English, but is it wrong in signs?

My pet theory is that quotes for emphasis were popularized in 20th century movie posters, where it was common to surround the movie title in quotations (this is still the accepted citation style in, say MLA style). This is probably wrong, of course.

Italics or bold for emphasis can be hard to hand-write, and the quotation marks for emphasis probably look more legible on chalk signs.

Re: Why do women have periods when most animals don't?

#59
post #12

Please fix the apostrophe in "animal's" It is annoying and leads non-native speakers on the board astray. Thank you. To non-native speakers: apostrophes are for possession, not plural.

Apostrophes are commonly used for plurals in signs, in what has come to be called the "greengrocer's apostrophe". It was a standard in the 19th century that has come to be disfavored in literary English. https://en.wikipedia.org/wiki/Apostrophe#Greengrocers.27_apo...

Re: Why do women have periods when most animals don't?

#60

Earlier quoted context omitted.

> To non-native speakers: apostrophes are for possession, not plural. You could easily repeat that for plenty of native speakers. It's one of the most common mistakes in written English.

Isn't it sad? It's such a frustrating mistake. There's a bar that we drive past frequently that does it with everything. They're "Now accepting application's" and their "Burger's are $2" Sad.

Is it sad? Who cares? This minor mistake almost never makes a meaning unclear and at best it's used as a social indicator to classify people (perhaps in some contexts people are using it deliberately for this reason).

Apostrophe's represent plural's in one of the languages most closely related to English, i.e. this has changed in the recent past, and will change again.

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