Dominant paradigms: sexual differentiation & intersex
As a feminist scholar new to the 'hard' sciences, I'm learning about sexual differentiation in a neuroscience course. I'm fascinated in how we come to know what we know (and how we come to NOT know...) and am intrigued by the metaphors and paradigms embedded in scientific education.
For example, as a foetus, undifferentiated gonads become testes through a particular activation pathway (involving SRY). Female gonads are the 'default' position, so it goes. Here again, we hear echoes of our first biology lessons: the 'active' sperm, the 'passive' ovum. The testes are activated to differentiate, and if nothing happens, if the switch is not 'turned on', you're left with ovaries. Mine is an embarrassingly simplistic summary, yes, but the bottom line is that there is a way in which paradigms are taught and transmitted through that bastion of objectivity: science.
New research is starting to question this very issue, and a recent article by S.G. Tevosian (2013) reviews new thinking related to early sexual differentiation vis-Ă -vis ovarian development; that is, there is ovarian development, not just a default ovarian situation failing the trigger which prompts the development of testes. Ovarian development is not a default position. It too experiences activation pathways, quelle surprise!Â
These results ... reinforced the notion that ovarian differentiation engages more than one pathway and that all of them would have to be simultaneously disabled to shift the balance towards the male fateâŠÂ (Tevosian, p. 40)
As my own research focus is the health and quality of life of intersex persons, or what in science is problematically termed 'disorders of sex development' (DSD), it is interesting that studies in DSD are the areas that are helping researchers to think about 'normal' sexual differentiation.Â
And for me, this comes full circle: in thinking about the genealogy of intersex, critical theorists, scientists and gender scholars have argued in various ways that 'intersex' is a trope deployed to bolster and verify 'normal' sex. The perceived abnormality of intersexed bodies reinforces the solidity and normality of female-male sexed bodies (Swarr, 2012). But, the inconsistencies of sex do not make room for the intersex as much as intersex strengthens the âboundaries of femaleness and malenessâ because it âhighlights their inconsistenciesâ (Swarr, 2012).Â
The late 'discovery' of different pathways of sexual differentiation is an example of how preconceived notions of sex permeate the kind of questions we ask and the answers these limited questions can provide.Â
Iain Morland (2006), a theoretician on matters of intersex and a self-identified intersex person, encourages us to move beyond a âtruth seekingâ science, to asking different questions (Roy, 2012). If science is about truth-seeking, we would do well to remember that the practice - that is, the scientific method, was born of a confrontation with 'ambiguously' sexed bodies. In these diagrams, we can see a shift from sex assumptions in science (male differentiation is active, female is passive) to new thinking about sex differentiation, which, once more, returns us to a foundational trope in scientific thought: intersex.
Image: Traditional paradigm from William R. Rice, Urban Friberg and Sergey Gavrilets (2012) Homosexuality as a Consequence of Epigenetically Canalized Sexual Development. The Quarterly Review of Biology. 87(4): 343-368
Image: ovarian development as activated versus being a default position, from Tevosian, S. G. (2013) Genetic Control of Ovarian Development. Sexual Development, 7(1-3), p 34.
And that leaves us with the question, if intersex is so fundamental, why is it so obscure, why is it that we have so little research about the intersex situation beyond 'corrective' surgeries at birth or psychological treatments, as opposed to wellness and quality of life research for intersex persons, as intersex persons, through their lifetime?
https://genderedinnovations.stanford.edu/case-studies/genetics.html
Tevosian, S. G. (2013). Genetic control of ovarian development. Sexual Development, 7(1-3), 33â45. doi:10.1159/000339511
Swarr, A.L. (2012) Sex in Transition: Remaking Gender and Race in South Africa. Albany: SUNY Press.
Schiebinger, L. (2004) Nature's Body: Gender in the Making of Modern Science. 2nd Ed. New Brunswick: Rutgers University Press.
Repo, J. (2013) The Biopolitical Birth of Gender: Social Control, Hermaphroditism, and the New Sexual Apparatus. Alternatives: Global, Local, Political, 38(3): 228-244.