| 摘要 |
The present invention relates to a menstrual calendar capable of estimating an expectant date of pregnancy or contraception easily and conveniently, using a woman's menstrual period. According to an embodiment of the present invention, there is provided a menstrual calendar characterized in that, the calendar comprises a base plate (10) on whose opposite surfaces a period indicator (11) is formed, rotating plates (30, 30') formed with a transparent window (32) and a date indicator (31) respectively, and fixed pins (20, 20'). According to another embodiment of the present invention, there is provided a menstrual calendar characterized in that, the calendar comprises a base plate (10') on whose opposite surfaces a menstrual beginning line (1) and a menstrual period (2) is displayed, the first rotating plates (40, 40') formed with an expectant pregnancy period displayer (13) and a period indicator (12), the second rotating plates (50, 50') formed with a transparent window (32), respectively, and fixed pins (20, 20'). |
