- I used two things together: the My Calendar app and watching cervical mucus
- The fertile window is about 6 days: the 5 days before ovulation, plus ovulation day itself
- Odds peak 1–2 days before ovulation - not the day the test line finally darkens
- Didn't bother with OPK strips or basal body temperature - the combination above was enough
I kept this one simple: the My Calendar app to estimate the window, and watching cervical mucus to actually confirm it in real time. No test strips, no morning temperature charting - just those two, together.
The app did the first pass
I'd already been using My Calendar for period tracking for years, long before we started trying, so reaching for it to estimate ovulation too was the obvious move - no new app to learn. It estimates ovulation from your cycle history: the standard math is counting about 14 days before your next period is due, not 14 days after your last one, which is a mix-up that trips people up when cycles run shorter or longer than the textbook 28 days. It gave me a rough window to pay attention to.
Cervical mucus confirmed it
In the days before ovulation, discharge shifts from dry or sticky, to creamy, to a clear, stretchy, slippery texture people compare to raw egg white - and that stage is the clearest physical sign the body gives you. When the app's predicted window and that physical sign lined up, that's when we actually timed things.
One honest thing nobody mentions beforehand: after intercourse around this window, it can feel like everything is coming right back out. That's normal - it's just excess fluid, not a sign anything went wrong.
The fertile window, in plain numbers
Pregnancy is possible on the 6 days ending on ovulation day - the 5 days before, plus the day itself, since sperm can survive roughly that long waiting for an egg. The egg itself is viable for only about 12–24 hours after release. Odds aren't flat across those 6 days: they climb toward ovulation, peaking in the 1–2 days right before it.
What I skipped, on purpose
Ovulation predictor kits (pharmacy strips that detect the LH surge, usually 24–36 hours before ovulation) and basal body temperature charting (a small rise after ovulation confirms it happened, but only after the fact) are both reasonable add-ons - they're just not what I used. App plus cervical mucus was enough for us, and that combination is a common enough starting point that it's worth trying before reaching for anything more involved. On when to get help: general guidance is to see a care provider after about a year of trying if you're under 35, or after six months if you're 35 or older.
- PregnancyInfo.ca (SOGC) - tools for understanding fertility
- HealthLink BC - ovulation and fertility for pregnancy planning
- Mayo Clinic Press - finding your fertility window
- Cleveland Clinic - conception: fertilization, timeline, and how to get pregnant