Green’s Dictionary of Slang

gynaecology.

1942		Berrey & Van den Bark Amer. Thes. Sl. §534.1: Gynae, gynaecology.
2002		Fabian & Byrne Out of Time (ms.) 144: Later I had a look round the gynie ward. [...] The beds were full of straight women with Alma Cogan hairdos, quilted dressing gowns and mules. They smoked cigarettes and gossiped about their tubes and ovaries.