The diagnosis of pregnancy can be made with the help of symptoms and signs of pregnancy and with biochemical, ultrasonographic, or other ancillary tests, which detect physiological or pathological changes during pregnancy.
Iatrakis, G. (2015). Symptoms and signs of pregnancy - Objective findings of pregnancy [Chapter]. In Iatrakis, G. 2015. Obstetric Problems and Solutions [Undergraduate textbook]. Kallipos, Open Academic Editions. https://hdl.handle.net/11419/2353