During the Pregnancy Test Hoedown, Greg Proops sings that he and his girlfriend have not made love and thus she claims her pregnancy is an immaculate conception. The Immaculate Conception is a uniquely Catholic doctrine proclaimed by Pope Pius IX in 1854, which holds that by a special act of divine grace, Mary was conceived without the stain of original sin (hence her conception was immaculate, meaning spotless). The general Christian belief that Jesus was conceived by the power of the Holy Spirit and born of a virgin is the doctrine of the Incarnation (referring to his status as God Incarnate) .