I'd like to know what exactly happens at each point in a woman's cycle... Which days are our fertile days? I take HBC, and am pretty content with it as it is, but since I don't take it exactly at the same time everyday (maybe 3 hours apart, sometimes I take one in the morning and, in the next day, in the afternoon), I'd like to have extra protection on my fertile days.
I'd really appreciate it if someone could explain this to me, or point me to any reliable reference.
Thank you in advance!