Unknown pregnancy: Presentation of the case

There are two kinds of unknown pregnancies. A denied, unknown pregnancy, graviditatas ignota, when the pregnant woman unconsciously denies the existence of the pregnancy. Contrary to the denied pregnancy there is a hidden pregnancy, a concealed pregnancy in women who know they are pregnant but actively hide their pregnancy from the family, partner, friends, teachers, colleagues, etc. The prevalence of an unknown pregnancy during the first 20 gestation weeks is 1 in 475 pregnancies, in the second half of pregnancy it is 1 in 2455 pregnancies and at the moment of delivery it is 1 in 7225.