The idea that any development process could be ‘passive’ is clearly quite ludicrous – ovaries require just as much active assembly as do testes. Yet for fifty years the ‘default’ female system went unstudied. ‘Sexual differentiation isn’t about describing how you get females and males. It’s only about describing how you get males. For decades people were happy not to have an explanation of how you get the female form and just saying, “Well, it’s passive,”’ Drea asserted.
