We are using the Marquette Method so we are detecting the LH Surge with a Peak reading on a clear blue fertility monitor. We also use mucus signs. We detected a peak on 5/1 and 5/2 and then it went back to high on 5/3. The Marquette Method says to consider three full days after the last Peak (LH Surge) as fertile.
Everything I have read says that you will ovulate withing 48 hours of the LH Surge and that ovulation can last for a maximum of 24 hours. So I have two questions.
Why would you wait until 3 days after the last Peak detection? If ovulation happens within 48 hours of the LH surge then it should happen within 48 hours of the first detection right and not the second day of peak reading?
Why wait 3 full days instead of 48 hours + another 24 for ovulation? Even if I use the last peak day we take the reading in the morning. So 48 hours after that is the morning of the second day after. 24 hours after that is the morning of the 3rd day. Why wait the entire 3rd day?
Thanks for any help you can give and God bless.