Peak Day Courtney Updated September 15, 2018 02:06 Follow Peak Day: The last day of fertile cervical fluid/wet vaginal sensation during a cycle. Peak Day usually occurs the day before ovulation or the day of ovulation. Related articles What is Peak Day? Peak Plus 4 Rule Temperature Shift BBT 101 Fertility Charting Myths: Ovulation Dip Comments 7 comments Sort by Date Votes kdauburnfan March 17, 2015 02:26 Is it possible to have more than one? I've seen charts with several is the only reason I ask. 0 Permalink Lauren March 17, 2015 15:43 Hi kdauburnfan, yes, you can actually have two Peak Days in one cycle. Sometimes our bodies start producing fertile-quality cervical fluid and then stop, but we don't actually ovulate because our estrogen levels didn't quite get high enough to trigger ovulation. The last day of eggwhite-quality cervical fluid should still be marked as a Peak Day, even without ovulation, especially for women who are using FAM for birth control (so they can apply the Peak +4 Rule.) This is also why cervical fluid isn't as reliable an indicator of ovulation as basal body temperature is. I hope that makes sense :) 0 Permalink breannahofer March 21, 2015 17:11 I'm charting for the first time. Is it possible to know your peak day on the actual day or do you have to go back and mark the last day or fertile cf? Also, is temp an indicator of your peak day? 0 Permalink Lauren March 23, 2015 17:10 Hi Breanna, since your Peak Day is always the LAST day of fertile-quality cervical fluid that you have in a particular cycle, it's only possible to identify your Peak Day in retrospect (after it's already over). Your temperature is not a reliable indicator of your peak day - your temperature can only tell you when ovulation is already over, which is usually a day or so after your Peak Day. You can read more about what your BBT can teach you here: https://kindara.zendesk.com/entries/23626932-BBT-101 I hope this helps! 0 Permalink momo222 May 04, 2015 18:36 My chart shows last day of CF then a dry day then more CF the following day. It's clear that I Ov on the last day of CF but why then the dry day then Cf day? 0 Permalink Lauren May 05, 2015 16:27 Hi Momo, thanks for contacting us! It's actually not unusual for women to continue to have cervical fluid even after ovulation is over. The important distinction is the type of cervical fluid you're seeing. If the cervical fluid is creamy or sticky, this does not indicate that fertility is returning. If the cervical fluid is watery, slippery, or stretchy like eggwhites, this may mean ovulation has not actually occurred yet and you're still fertile. I hope this helps! 0 Permalink imperialjet+kindara December 30, 2015 19:20 My last three cycles/charts have automatically had the Peak Day showing. But this chart doesn't. Is there a reason for why it's missing? 0 Permalink Please sign in to leave a comment.