After graduation she worked as a registrar specialising in obstetrics and gynaecology at Simpson's maternity hospital, Edinburgh, under the supervision of Professor Robert Kellar.[1] When she became engaged to marry fellow gynaecologist, John Loudon, Kellar declared that there was no place for a married woman in obstetrics and she was forced to resign her post.[2] Two years later, John Loudon was to accept the registrar post under Professor Kellar that Loudon had been forced to resign.[1]