This may be a dumb question...

Laura
Especially since I've had three pregnancies, but it's been 5 years!! Lol I am <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a> by my CM. does ovulation occur in the day with the highest amount of egg white CM? To calculate DPO do I go by that date or when my CM is no longer fertile?