The Fertility Tracker? is a 100X magnification illuminated microscope.  This means you can not only see patterns forming sooner in the cycle.  Now with 6 slides included you can now save the previous patterns and compare them on a rotation basis.  The 44 page booklet will allow you to understand more of what your patterns mean and give you many examples of what you might see.  This booklet also covers a variety of topics along with tracking salivary and mucus patterns.  Other subjects include understanding the menstrual cycle, hormonal imbalance and more.