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

bbc.com

11–20 of 68 posts

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

#14
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…

There were a few explanations proposed. This was one of them, but it was unclear if this is the theory with the most support.

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

#15
post #6

Weird thing for hacker news

Downvoted but you have a point. Why is there no moderation with regards to topical content on HN? Why should HN be a place for pop-sci articles and repostings from the likes of the Economist, LA Times, BBC, etc. r/startups has more content pertaining to - you know - actually starting a technology business than HN does. HN lately reads like newsclippings sent to me by my grandma.

Why is there no moderation with regards to topical content on HN?

As per the posted policy when I joined HN, this would have been topical. (It has changed since.) "Anything that would be interesting to hackers." I don't mind at all if the occasional pop-sci article comes by, so long as they don't all do so unfiltered.

Ironically, this comment and the one it replies to are distinctly against the moderation policy, as per my understanding.

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

#17
post #6

Weird thing for hacker news

Downvoted but you have a point. Why is there no moderation with regards to topical content on HN? Why should HN be a place for pop-sci articles and repostings from the likes of the Economist, LA Times, BBC, etc. r/startups has more content pertaining to - you know - actually starting a technology business than HN does. HN lately reads like newsclippings sent to me by my grandma.

A glance at the homepage makes me wonder if your grandma is a former co-worker of Grace Hopper or something like that.

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

#18
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.

> 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.

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

#19
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.

> 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.

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