RotationBeads make natural family planning easy. To use RotationBeads a woman simply moves a ring over a series of color-coded beads that represent her fertile and low fertility days. The color of the beads lets her know whether she is on a day when she is likely to be fertile or not.RotationBeads are a color-coded string of beads that represent a woman's menstrual rotation. Each bead represents a day of the rotation and the color helps a woman to determine if she is likely to be fertile that day. The day a woman starts her period she puts the rubber ring on the red bead. Each day she moves the ring one bead, always in the direction of the arrow. When the ring is on the red bead or a dark bead, there is very low likelihood of pregnancy, so she can have intercourse on these days without getting pregnant. When the ring is on a white bead - Days 8 through 19 - there is a high likelihood of getting pregnant if a woman has unprotected intercourse. Please note: The Standard Days Method, on which RtoationBeads are based, works best for women with regular menstrual rotations that are between 26 and 32 days long. Women with rotations outside this range should use a different method of family planning.