The topic of “progesterone” is specific, unique and complex. Since the discovery of this substance, which happened almost a century ago, interest in the hormone has increased and decreased, but, nevertheless, they talk and write about progesterone constantly. In different countries of the world, there are artificially created myths regarding the use of certain medications drugs or different types of treatment. The creation of psychological dependence on taking medications, in particular progesterone, has led to the fact that the myth about the omnipotence of certain drugs has reached not just dangerous levels. The West has already experienced a period of uncontrolled use of progesterone. In the territory of the former USSR, where the myth about the universality of this hormonal substance has been dominant for almost thirty years, the question remains extremely relevant. The progesterone nation is no longer just a group of women taking progesterone almost constantly before pregnancy, during pregnancy and after her. These are already tens of millions of women who have been introduced into their thinking-consciousness by the false idea of the “omnipotence” of progesterone. This book provides a large amount of the latest information about progesterone, a hormone that is an important organic substance in the human body, both women and men. Without it, life is impossible, but from a friend and a very useful substance, it can turn into a real enemy, quiet and inconspicuous. This is not just a pregnancy hormone, it is the matrix of so many human hormones. The book about progesterone is intended for those who want to increase their level of knowledge about this hormone and help others get rid of the dangerous myth that gives rise to the “progesterone nation.” Book by Elena Petrovna Berezovskaya, author numerous publications on the topic of women's health, is unique and the only one in the whole world in which such a voluminous and detailed analysis of the importance of progesterone, a steroid hormone, for the function of the human body, as well as the use of progesterone and its synthetic forms in medicine, in particular in obstetrics and gynecology. In an accessible form, the author provides a large amount of scientific data, describes the emergence of the myth about “conservation therapy” and “progesterone deficiency,” and discusses the issue of the safety of using progesterone during pregnancy. The book also discusses numerous "female diseases" and the importance of using progesterone in the diagnosis and treatment of these diseases.