Calendar breeding females
To remove healthy females to do all the time. In order to not miss this time, there are special calendar. This calendar is two circles that need to be cut and stapled together.
The large circle painted days, and a small painted stage of cancer. Circles are attached to each other and rotating in the middle, so they can be synchronized. On the calendar will be seen at what stage is the development of the uterus at the time.
Also it is more detailed instructions of use and labeling uterus table according to their year of birth.
calendar printed on thick cardboard.