I’ve written blogs about many options for contraception, but have failed to write about the oldest method, natural family planning.  The new term for this in the medical world is call fertility awareness-based (FAB) methods for pregnancy prevention.  Some women cannot or choose not to use birth control (pills, IUDs, etc) due to medical, religious, or cultural reasons; and thus, rely on FAB methods.  We will get into the details below, but the basic principle is to identify the fertile days of the menstrual cycle using a combination of cycle length and physical signs of ovulation—and then avoiding sex or using a barrier method on these days.  Now, a quick disclosure from me is warranted...I've never practiced FAB methods so all of this is based on my reading and prior knowledge of menstrual cycles and fertile windows.

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