The luteal phase: symptoms, length and cravings

The second half of your cycle: how long it lasts, why the days before your period feel the way they do, and what a “short luteal phase” means.

Last reviewed 26 October 2026Checked against the sources listed below

This guide is for you if you want to understand the second half of your cycle: how long the luteal phase lasts, why the days before your period can bring tender breasts, cravings or a shorter temper, what a “short luteal phase” means, and when any of it is worth talking to a doctor about.

What the luteal phase is

The luteal phase runs from ovulation to the start of your next period. After the egg is released, the follicle that held it becomes the corpus luteum, which makes progesterone and some estrogen, and progesterone thickens the lining of the uterus.^[1] Progesterone stays at its highest in the middle of this phase.^[2] If no pregnancy begins, progesterone and estrogen then fall quickly, and as they fall the lining is shed as your period.^{[3, 4]}

For how this phase fits with the other three, see the four phases of the menstrual cycle; for the hormone curves themselves, see the menstrual cycle hormone chart.

How long is the luteal phase?

Cleveland Clinic gives 12 to 14 days as the average, counts 10 to 17 days as normal, and calls a luteal phase shorter than 10 days short.^[1] Real-world data looks similar: across more than 600,000 cycles logged in the Natural Cycles app, the luteal phase averaged 12.4 days, with most between 7 and 17.^[5]

The same data shows why this phase matters for working out the rest of your cycle. The luteal phase varies much less than the follicular phase before ovulation, so when a cycle is longer or shorter, it is usually the first half that has changed.^[5] That is why counting back from your next period is a better guess at when you ovulated than counting forward from the last one.

There is a catch. You can only know your own luteal length if you know when you ovulated, and a calendar can’t tell you that. A positive ovulation test gives a better idea, but it means ovulation is likely soon, not that it has happened.^[6]

Luteal phase symptoms

The changes people notice in the luteal phase are the familiar premenstrual ones. Cleveland Clinic says luteal-phase symptoms resemble those of premenstrual syndrome (PMS), such as tender breasts and bloating.^[1] Changes in mood, appetite and sleep are also common before a period.^[7] Mayo Clinic lists mood swings, irritability, tiredness and food cravings among PMS symptoms, and notes that they tend to come back in a predictable pattern.^[8]

They usually don’t last. For most people, Mayo Clinic says, the signs and symptoms of PMS go away within four days after the period starts.^[8] How strong they are varies from person to person, from mild to severe.^[8]

Why cravings can show up before your period

Food cravings are one of the PMS symptoms Mayo Clinic lists,^[8] and research is starting to look at why. In a small study that followed 37 women over two or three cycles with repeated blood tests, those with higher progesterone in the middle of the luteal phase reported fewer premenstrual food cravings, while estrogen showed no link.^[9] It is one study, and a small one, so it suggests a connection rather than proving a cause.

In practice, the most useful thing is to learn your own pattern. If cravings reliably arrive a few days before your period, you can plan for them, for example by having meals and snacks you actually want ready for that week, instead of being surprised by them each month.

A small rise in body temperature

Progesterone also brings a slight change you can’t feel: if you take your temperature as soon as you wake up, it rises a little after ovulation, by as little as 0.4°F (0.22°C).^[1] Tracking that rise, called basal body temperature, takes a reading every morning before you get up. Bloom doesn’t read a thermometer, so this is something you would do separately.

What a short luteal phase means

A luteal phase of under 10 days counts as short, and it can be a sign of luteal phase defect.^[1] In luteal phase defect, the lining of the uterus doesn’t thicken enough, and Cleveland Clinic says it is related to progesterone: either the body doesn’t make enough, or the lining doesn’t respond to it.^[10]

Because you can’t see ovulation on a calendar, a short luteal phase isn’t something you can diagnose from period dates alone. If you are trying to get pregnant and your cycles or signs suggest your luteal phase may be short, that is a reasonable thing to raise with a doctor, who can look into it properly.

How Bloom handles the luteal phase

Bloom places your luteal phase by counting back from your next expected period. It starts from a 14-day luteal phase, and if you log ovulation tests or cervical fluid, it switches to your own luteal length, anywhere from 9 to 18 days, once two cycles of those signs line up. If your period is due and hasn’t come, Bloom keeps you in the luteal phase and tells you it is waiting, rather than starting a new cycle on schedule.

During the phase, your check-ins are compared with what the luteal phase usually brings, so over a few cycles you can see whether your premenstrual days follow a pattern. You can set one focus for the phase, and in the iPhone and Android app a reminder can arrive about two days before your period is due.

Bloom can’t confirm that you ovulated, so its luteal phase is always an estimate, and it can’t diagnose a short luteal phase or anything else. It is not a fertility tool or contraception.

Making the luteal phase easier

• Log how you feel for a few cycles. Note mood, energy, sleep and cravings in the days before your period, so you can see what really repeats.
• Plan the predictable parts. If the last few days before your period are reliably harder, put fewer demanding things there when you can.
• Count when symptoms start and stop. Symptoms that start after ovulation and ease once your period begins fit the premenstrual pattern; symptoms that don’t are worth mentioning to a doctor.
• Don’t judge one month. A single rough cycle tells you less than three or four logged ones.

Bloom is a wellness and planning app. It is not a medical device, it does not diagnose or treat any condition, and it is not a method of contraception. This page is general information, not medical advice. If something about your cycle worries you, talk to a doctor, nurse or midwife.