Emma Hilton Profile picture
Jan 5 11 tweets 17 min read
@WackyPidgeon @JamesVSD1 @zaelefty @JuliaMasonMD1 @madadhruadh @hoovlet I don’t think I have a ‘verdict’. There’s so much in that post/video that it’s difficult to unpick my thoughts.

First, there is the stuff about how to classify CAIS and there is discussion within this thread about the dev bio, endocrinonlogy etc.
@WackyPidgeon @JamesVSD1 @zaelefty @JuliaMasonMD1 @madadhruadh @hoovlet I have never hidden my developmental biology understanding of sex, which is centred not on chromosomes (or any other determination mechanism) but on gamete type, which is in animals a product of gonad type.
@WackyPidgeon @JamesVSD1 @zaelefty @JuliaMasonMD1 @madadhruadh @hoovlet Thus, I agree with @OwnerOfIdeas that the taxonomy of AIS, involving testes that would typically make sperm and not ovaries that would typically make eggs, is male. Others disagree, but I maintain this is the only coherent description of sex.
@WackyPidgeon @JamesVSD1 @zaelefty @JuliaMasonMD1 @madadhruadh @hoovlet @OwnerOfIdeas I hope I have also been consistent that DSDs are not simply academically interesting, but that they affect *people*. And people are not words in a textbook.
@WackyPidgeon @JamesVSD1 @zaelefty @JuliaMasonMD1 @madadhruadh @hoovlet @OwnerOfIdeas With that in mind, I find it very difficult, in the post/video, to reconcile a call for ‘compassion’ with an ugly shift from academic classification>a token nod to pragmatism>blaming women with CAIS for their biology.
@WackyPidgeon @JamesVSD1 @zaelefty @JuliaMasonMD1 @madadhruadh @hoovlet @OwnerOfIdeas But the concept of women with CAIS having ‘male entitlement’ shocked me, TBH.

Babies with CAIS are observed female. They are brought home as girls. They are treated like girls, and all that entails in a gendered world - the extensive socialisation, the risks, the expectations.
@WackyPidgeon @JamesVSD1 @zaelefty @JuliaMasonMD1 @madadhruadh @hoovlet @OwnerOfIdeas Sex-selective abortion, FGM, infanticide, nutritional and educational neglect, becoming child brides, being kidnapped by Boko Haram, being abused and raped, being shot at their college by an armed incel who hates women. We all know the lists.
@WackyPidgeon @JamesVSD1 @zaelefty @JuliaMasonMD1 @madadhruadh @hoovlet @OwnerOfIdeas Male entitlement doesn’t originate in a Y chromosome or internal testes that don’t ‘do their job’. Male entitlement (and the corresponding effect on female lives) is not innate, it is acquired during one’s formative years being observed as male or female. Because patriarchy.
@WackyPidgeon @JamesVSD1 @zaelefty @JuliaMasonMD1 @madadhruadh @hoovlet @OwnerOfIdeas I know people are concerned about ‘giving an inch’ as a slippery slope that ends with any male in female spaces. I don’t see it for CAIS. Because, ironically, nobody ‘sees’ CAIS women as male at any given moment or, importantly, *at any point in their lives*.
@WackyPidgeon @JamesVSD1 @zaelefty @JuliaMasonMD1 @madadhruadh @hoovlet @OwnerOfIdeas As ever, happy to discuss. There’s a lot going on and I’m still mulling it over.
@WackyPidgeon @JamesVSD1 @zaelefty @JuliaMasonMD1 @madadhruadh @hoovlet @OwnerOfIdeas It feels to me like the author of the post/video has, in their haste to make no exception to ‘no males in female spaces’, forgotten about, well, what feminism is. Does that make sense?

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More from @FondOfBeetles

Jan 19
I recently tweeted about people who think I believe humans are asparagus.

This bad faith take stems (ha ha) from an analogy I’ve used to illustrate that the phenomenon of male/female is not limited to the constructions of the human brain. Image
Like many plants, and like humans, (some) asparagus strains are dioecious - they exist as individuals male and individual female plants. In animals, we call this set up ‘gonochorism’.
Asparagus can reproduce via the fusion of one small and one large gamete (sometimes, they reproduce asexually).

Biological convention denotes the plant morph producing the large gamete, found in the ovules, as ‘female’.
Read 16 tweets
Jan 18
Sexual dimorphism.

Systematic differences between the two sexes of a gonochoristic species of a physical characteristic (or set thereof), not including reproductive anatomy.
Some sexually dimorphic characteristics are non-overlapping (e.g. deer antlers) while some are very overlapping (e.g. human height).

The extent of overlapping observation/measurement is irrelevant. The only requirement is a robustly-detectable difference between sexes.
Many female humans are taller than many male humans, yet the population descriptions of height in humans consistently reveal that males as a sex class are taller than their demographically-matched female peers.

Height in humans is a sexually dimorphic characteristic.
Read 11 tweets
Jan 13
@xandvt @MumpGorithm @refined_devon @BBCMorningLive @BBCiPlayer I am honestly appalled by your behaviour here. You are a medic and a public communicator, and you seem unable to use basic and commonly-understood words when discussing concepts like population health screens.
@xandvt @MumpGorithm @refined_devon @BBCMorningLive @BBCiPlayer The WHO make it clear that an ethical population screen uses clear language that will maximise capture of the target demographic. Who are the target demographic for prostate screens?
@xandvt @MumpGorithm @refined_devon @BBCMorningLive @BBCiPlayer To define the population demographic for prostate screening as ‘those with prostates’ lacks any explanatory value. It’s a linguistic dead end. Replace ‘prostate’ with a less well-known structure, and then consider how effective a screening campaign will be….
Read 12 tweets
Jan 4
@tomhfh Tom. Promise me you will never teach statistics.

The graph you have posted clearly shows two overlapping normal distributions.

Each normal distribution is associated with either the female sex or the male sex.
@tomhfh As you correctly point out, short males are not female.

Yet a very short male may appear in the little area of overlap highlighted, because they are at the far left of the male normal distribution, not because they are magically ‘intersex’ or ‘a bit female’.
@tomhfh The X axis in the graph is not ‘sex units’. The graph is not mapping sex. It is a mapping schematically a characteristic associated with sex, like testosterone levels (in some concentration unit).

Sex is why you have a bimodal distribution of testosterone levels.
Read 11 tweets
Dec 22, 2021
My husband is laughing at me talking about Lennon’s death.

Turns out I got this very wrong.

What happened and was there there a sniper?
To explain, despite being a fan of the Beatles, I have never given thought to check out Lennon’s murder (and too young to remember it).

For some reason, perhaps too much Day Of The Jackal, I thought he was shot at long range by a sniper while…
…(and I can’t believe I’m about to type this)…while he was boating on that lake in Central Park. 😂

A lake I’ve visited 🤦‍♀️
Read 4 tweets
Dec 15, 2021
On staggered starts as a means of correcting for advantage. Thoughts for discussion.
Grevenberg has proposed that advantage carried by transwomen into female categories of sport might be corrected by means of ‘staggered starts’. Taking a broad view, we’ll assume this means some kind of handicap applied to transwomen.
Usain Bolt’s 100m WR average speed was 10.44 metres per second. FloJo’s was 9.53 metres per second.

We could, on these stats, create a dead heat between the two by starting Bolt 109.52m from the finish (FloJo at 100m) or starting him 0.91 seconds later than FloJo.
Read 14 tweets

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