Apparatus for the instant determination of the different phases of the women's menstrual cycle. (Machine-translation by Google Translate, not legally binding)

摘要

Apparatus for the instantaneous determination of the different phases of the menstrual cycle of the woman characterized essentially by a piece in which are marked several zones divided each of them in as many days as they compose the different menstrual cycles. In each of them are perfectly defined by colors a sector equivalent to the days of normal duration of the rule another equivalent to the days of duration of the first sterile phase; a division representing a dubious day in the cycle; a third sector equivalent to the fecund days; another division representing a doubtful day in the cycle; a fourth sector equivalent to the second sterile phase and a last division representative of the principle of the following rule. (Machine-translation by Google Translate, not legally binding)