This canvas is a part of a diptych with "Menstruation on canvas 2". This diptych clearly contrasts with an other dypitch of the artist, in blue of green, more masculine. The shocking title of the work not suggests to the feminity but to nature. The agressivity and active movements of the painting, contrast with the second part of the diptych, with more passive movements. These difference refers to different states, and different way to be in our world.
The character of these two pieces is so different, that each can be appreciated separatly, but it is the juxtaposition of these two that give the power, and the sense of the artwork.