Description
Predict your fertility days with the Knaus-Ogino method. You can back up data to a memory card. Remember: don't rely only on this for birth control—use more accurate methods like basal temperature tracking.
NPYXNPYXPredict your fertility days with the Knaus-Ogino method. You can back up data to a memory card. Remember: don't rely only on this for birth control—use more accurate methods like basal temperature tracking.