The Luteal Phase: Progesterone, PMS, and What's Normal
The luteal phase begins right after ovulation and ends when your next period starts. The ruptured follicle becomes a temporary structure called the corpus luteum, which produces progesterone to prepare the uterine lining for a possible pregnancy. This phase usually lasts about 11 to 17 days and tends to be more consistent in length than the follicular phase, even when overall cycle length varies.
Hormones through the cycle
Estrogen: A smaller second rise, then falls before the next period.
Progesterone: Rises sharply after ovulation, peaks mid-phase, then drops if pregnancy doesn't occur.
LH: Low.
FSH: Low, starting to creep up again near the end as the next cycle approaches.
A simplified illustration of estrogen, progesterone, LH and FSH across a typical 28-day cycle. Individual levels and timing vary, and this is not a lab measurement.
After releasing an egg, the ruptured follicle transforms into the corpus luteum, which secretes progesterone along with a smaller amount of estrogen. Progesterone keeps the uterine lining thick and ready in case the egg is fertilized.
If pregnancy does not happen, the corpus luteum breaks down roughly 10 to 14 days after ovulation. Progesterone and estrogen levels fall sharply, and that drop is what triggers the uterine lining to shed, the start of the next menstrual phase.
As progesterone and then estrogen fall in the final days of this phase, many people notice premenstrual symptoms: bloating, mood changes, breast tenderness, food cravings, or fatigue. These typically ease once the next period starts; symptoms severe enough to disrupt daily life (sometimes diagnosed as PMDD) are worth discussing with a doctor.
Cycle syncing: nutrition & movement
| Focus | Nutrition | Movement |
|---|---|---|
| Easing PMS-type symptoms | Complex carbohydrates and magnesium-rich foods (whole grains, leafy greens) alongside calcium and vitamin B6, which some studies link to fewer mood symptoms. | Moderate, steady-state cardio earlier in the phase. |
| Reducing bloating | Cutting back on excess salt, caffeine, and alcohol in the final days can help some people feel less bloated. | Tapering toward lower-intensity movement (pilates, yoga, or walking) as the phase goes on. |
| Winding down | Regular meals to help manage food cravings and blood sugar swings. | More rest and recovery time, since energy typically dips before your period. |
These are general, low-risk wellness suggestions, not medical treatment. Evidence for timing diet and exercise to cycle phase ("cycle syncing") is still limited.
Find your own dates
Enter your usual cycle to see roughly which days fall into each phase for you.
Your estimated phase dates this cycle
Menstrual Phase
1–5
Follicular Phase
6–11
Ovulatory Phase
12–15
Luteal Phase
16–28
Understand your own PMS pattern
Bloom Private's PhaseCalculator engine reads the dates you log and works out which phase you're in, entirely on your iPhone. No accounts, no servers, and nothing to sell: your cycle data stays on your iPhone unless you choose to export it or turn on Apple Health.
Frequently asked questions
As progesterone and estrogen fall sharply in the last days of the luteal phase, that hormonal drop is linked to symptoms like mood changes, bloating, and fatigue for many people. If symptoms are severe enough to disrupt daily life, ask a doctor about PMDD, a more intense form that is treatable.
Usually about 11 to 17 days, most often close to 14. It's typically more consistent than the follicular phase, so a luteal phase shorter than 11 days is sometimes discussed with a doctor if you're trying to conceive.
A luteal phase that runs noticeably longer than usual, with no period, can be an early sign, but the only way to know is a pregnancy test taken at least a few days after your period was expected.
Explore the other phases
Sources
This page is for general education, not medical advice, and Bloom Private is not a contraceptive method. Talk to a healthcare professional about your own cycle and symptoms.