Female menstrual cycle models (set of 5)

Model for students with a disc cut into "days of the cycle" compartments movable around an axis itself connected to a second disc "days of the month" of 31 days.
These 2 concentric discs allow to determine the period of menstruation based on the duration of the cycle.

Support dimensions (L x W): 150 x 150 mm
Delivered with instructions.

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1 disc (Ø 120 mm)" "day of the month" "of 31 days, mounted on a square support (dim. 150 x 150 mm). - 1 blank "" female menstrual cycle "" disc, plasticized and rewritable (dry erase marker not supplied) - Ø 100 mm. Supplied with instructions.