Menstrual cycles can be baffling, and that's why we have a poster explaining this special time of the month. Be amazed as the estrogen takes a nosedive right before ovulation! Check out the egg as it takes its long journey through your reproductive system! Marvel at the luteal lunacy! It is all so very exciting and just what you needed for your bathroom wall. This 18" x 24" poster was printed with soy ink on 30% recycled paper in the USA. NOTE: If ordered with other items, this poster may ship separately to prevent damage.