This accident[1] not infrequently happens during the course of acute or chronic diseases. It is especially liable to occur during small-pox, relapsing fever, bilious-remittent fever, syphilis, St. Vitus dance[2] and infectuous diseases. Its proper treatment is given in the article on Abortion in the section on Diseases of Women.[1] Spontaneous abortions are increasingly referred to as miscarriages, even in medical literature. There is a lot of literature discussing the use of "sensitive language".
[2] St. Vitus Dance is a horrible archaic term for Sydenham's chorea, which is characterised by rapid, uncoordinated jerking movements.