<unk>  was a hormone-based pregnancy test used in the 1960s and 1970s that consisted of two pills that contained norethisterone (as acetate) and ethinylestradiol. It detected pregnancy by inducing menstruation in women who were not pregnant. The presence or absence of menstrual bleeding was then used to determine whether the user was pregnant. In South Korea it was also used, "perhaps as a double dose" to induce abortions. When first made available for sale in the UK in 1959, the pregnancy test in use involved injecting toads with a woman's urine. It was withdrawn from sale in the UK in 1978.<unk>  was produced by Schering AG, a German company taken over by Bayer AG in 2006. Another hormonal pregnancy test called Duogynon was in use in Germany during the same general time period.
Primodos
Zebra 
Tolibut
Wellbee
Bowl of Hygieia
Philotimus
Brine
Humouse