You can often tell you are ovulating by combining a few body signs: clear, stretchy cervical mucus, a positive LH test and a small rise in basal body temperature afterwards. No single sign is perfect, but together they give a reliable picture of whether, and roughly when, you ovulate.
1. Cervical mucus changes
In the days before ovulation, rising estrogen makes cervical mucus clearer, more slippery and stretchy, often compared to raw egg white. After ovulation it usually becomes thicker or drier again. This is one of the earliest signs that your fertile window has started.
2. A positive LH test
Luteinizing hormone (LH) surges about 24 to 36 hours before ovulation. Urine ovulation tests detect this surge. A positive test suggests ovulation is coming, but it does not prove it happened.
3. A rise in basal body temperature
After ovulation, progesterone raises your resting temperature by a small amount, often around 0.2 to 0.5 °C, and keeps it higher until your next period. Because the rise comes after ovulation, temperature confirms it rather than predicting it. Measure at the same time each morning before getting up.
4. Changes in the cervix
Around ovulation, the cervix tends to be higher, softer and more open. This sign takes practice and is not for everyone, but some people find it useful alongside mucus.
5. Mild one-sided pain
Some people feel a twinge or dull ache on one side of the lower abdomen around ovulation, sometimes called mittelschmerz. It is common and usually harmless, but not everyone feels it.
6. Other subtle signs
Some people notice breast tenderness, a higher sex drive or light spotting around mid-cycle. These signs are less consistent and work best as extra clues.
How reliable is each sign?
| Sign | Predicts or confirms | Notes |
|---|---|---|
| Cervical mucus | Predicts | Early sign of the fertile window |
| LH test | Predicts | Ovulation likely within 24 to 36 hours |
| Basal body temperature | Confirms | Rises only after ovulation |
| Cervical position | Predicts | Takes practice |
| One-sided pain | Suggests | Not felt by everyone |
Tracking the signs together
Bloom Private lets you log basal body temperature, cervical mucus, LH tests and cervical position in one place. After two cycles with detected ovulation, it personalizes your luteal phase. It is not a contraceptive method and should not be used to avoid pregnancy.
If you rarely see these signs, your cycles are often shorter than 21 or longer than 35 days, or you have been trying to conceive for a year (six months if you are over 35), talk to a healthcare professional. For a first estimate, use our ovulation calculator.
Frequently Asked Questions
Combining signs works best. LH tests and cervical mucus help predict ovulation, and a sustained rise in basal body temperature helps confirm it happened.
Yes. Many people do not notice clear signs. Tracking mucus, LH tests and temperature makes the pattern easier to see.
Not necessarily. It shows the LH surge that usually comes before ovulation. A rise in basal body temperature afterwards suggests ovulation happened.