Katharine Isabel Liebert was born in 1912 and was educated at the Manchester High School for Girls and Manchester University, where she obtained the degree of BSc in anatomy and physiology in 1934, and graduated MB ChB in 1937. She then held house appointments at the Royal Infirmary Manchester, St Mary's Hospital for Women and Children, and the Duchess of York Hospital for Babies. She also worked at the Christie Hospital, and in her clinical studies was greatly influenced by Mr Holt and Professor Dougal. She took the FRCS in 1941. After two years of military service when she became a Major in the RAMC, serving in the Middle East, she returned to Manchester in 1947 and was appointed consultant obstetrician and gynaecologist to Ancoats Hospital, and to Withington Hospital; though these were her principal attachments, she also undertook maternity work in some of the smaller hospitals in the region. Miss Liebert took the MRCOG in 1943 and was elected FRCOG in 1959. She was a warm-hearted person with a keen interest in all that went on around her, but especially in music and painting. She was very popular with her colleagues, and, though handicapped latterly by illness, went on working till shortly before she died from multiple sclerosis on 9 May 1965.