03 · Awareness

Know your body. Know your window.

Most TTC plans don't fail because of biology. They fail because of timing. The good news: timing is the most fixable thing on the list.

Shop ovulation tracking →I'm earlier than this
~6
Days a month you can actually conceive
12-24h
Egg viability after ovulation
3-5d
Sperm survival in the body
85%
Of TTC users mistime their first cycle
The four methods

How to actually find your fertile window.

Each method tells you a different part of the story. Most people who conceive quickly use at least two together.
Ovulation predictor kits

OPK strips

Detect the LH surge that happens 24-36 hours before ovulation. The most reliable way to predict ovulation ahead. For better understanding start testing from day 10 of your cycle.

Basal body temperature

BBT charting

A small temperature rise after ovulation confirms it happened. Doesn't predict, but tells you whether you ovulated and when, which is gold for next cycle.

Cervical mucus

Mucus tracking

Egg-white mucus appears in the days before ovulation. This method is free, fairly accurate, and works alongside any other method.

App-based

Cycle apps

Useful for spotting patterns and predicting, but a calendar prediction alone isn't enough. Always pair it with one of the other methods mentioned.

When to act

The simple rule for timing your insemination or attempt.

If you're using OPKs: a positive test means LH is surging. Inseminate or have intercourse within 12-36 hours. If you're inseminating, sooner is better as fresh sperm doesn't last long.
If you're tracking BBT only: by the time your temperature rises, you've already ovulated. Use BBT to confirm cycle patterns, but pair it with OPKs for live timing.
If you're cycle-app-only: okay for general awareness, not okay if you're actively trying to conceive. The window the app shows you is a guess based on previous entries, make sure to confirm with OPKs at minimum.

Tools that pay for themselves in a single cycle.

Read next

Going deeper.

Ovulation

How to use ovulation test strips effectively

Ovulation

BBT charting for beginners

PCOS

Tracking with irregular cycles or PCOS

Real stories

What ovulation actually felt like for me

Where to next

Once you know your window, the next step depends on your method.

If trying naturally...

Optimise natural conception

Beyond timing, the lifestyle factors that move the needle.

If using a donor...

Home insemination

How to actually do it once your fertile window opens.

If something's off...

Talk to us

Irregular cycles, no positive OPK, no luck after months of trying? let's talk it through.