 The study of medicine for women was called "Fuke" (known as gynecology and obstetrics in modern science and medicine); however, it has little to no ancient works based on it except for Fu Qing-zhu's "Fu Qing Zhu Nu Ke" (Fu Qing-zhu's "Gynecology").The most challenging part of a woman's health in Traditional Chinese Medicine was pregnancy and postpartum, this is because there were many definitions of pregnancy in traditional Chinese medicine.The recognition of pregnancy in the Western medical world has been around since the publication of the Hippocratic Corpus, circa mid-fifth century to the mid-fourth century BCE, in the gynecological treatises On the Nature of the Woman, On the Diseases of Women, Generation, On the Nature of the Child, On Sterile Women, On Fistulae, and On Hemorrhoids.