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Luteal phase

From ovulation to the next period, roughly 10 to 16 days.

What happens in the luteal phase?

The empty follicle turns into the corpus luteum, which makes progesterone. Progesterone makes the lining spongy and supportive and raises your resting temperature by a small amount (about 0.3 to 0.6°C). The luteal phase is steadier than the follicular phase, but it is not a fixed 14 days. The app study found an average of 12.4 days (range about 7 to 17). If no pregnancy happens, the corpus luteum fades, hormones drop, and your next period starts.

What people tend to notice, and what helps

Read more about this phase

Sources

  1. NHS: Periods and fertility in the menstrual cycle
  2. Cleveland Clinic: Menstrual cycle
  3. Cleveland Clinic: Ovulation
  4. Bull et al. (2019) Real-world menstrual cycle characteristics of more than 600,000 menstrual cycles, npj Digital Medicine

This is general information, not medical advice. Splash can’t diagnose. If you’re worried, talk to a GP, pharmacist or sexual health clinic. In an emergency call 999 (UK) or 911 (US).

Know which phase you are in today.

Splash shows your phase on the cycle ring every morning, with tips that fit it. Free, no account.