Cycle phases · Phase 4

Luteal Phase: Length, Symptoms, Hormones and Mood

The luteal phase is the stretch of your cycle between ovulation and your next period. This page is about understanding it: how long it usually lasts, which hormones are in charge, what people commonly notice in their body and mood, and which signs are worth raising with a doctor. If you are looking for what to eat, that lives in a separate guide to luteal phase foods.

At a glance

Starts: right after ovulation
Ends: the day before your next period
Usual length: about 11 to 14 days
In a 28-day model: roughly day 15 or 16 to day 28
Main hormone: progesterone from the corpus luteum

Length

How long is the luteal phase?

For most people the luteal phase lasts somewhere between 11 and 14 days. It tends to be the steadier half of the cycle. When a cycle runs 26 days one month and 33 the next, the difference usually comes from ovulation arriving earlier or later – in other words, from the follicular phase.

That is where the common shortcut comes from: ovulation ≈ cycle length minus 14. In a 32-day cycle that puts estimated ovulation around day 18; in a 25-day cycle, around day 11. Treat it as a model, though. Luteal length also differs between people and can shift by a few days from one cycle to the next.

Working out your own luteal phase

A calendar cannot see ovulation, so it can only guess where the luteal phase starts. Body signs get you closer:

Basal body temperature: after ovulation your waking temperature typically rises by about 0.2 to 0.5 °C (0.4 to 0.9 °F) and stays up until your period. The days on that higher plateau roughly equal your luteal phase. Our guide to basal body temperature explains how to chart it.
Cervical mucus: once progesterone rises it usually turns thicker, stickier or drier.
LH tests: they pick up the hormone surge shortly before ovulation. The luteal phase then begins about one to two days later.

Track two or three cycles and you will see what is typical for you rather than for an average.

Short or long luteal phase

A luteal phase that is repeatedly shorter than 10 days is usually called a short luteal phase or luteal phase defect. Spotting in the days before your period can be a clue. It is not an emergency, but it is worth checking with a clinician, especially if you are trying to conceive.

If more than 16 days pass after ovulation without a period, a pregnancy test makes sense. Just as often, ovulation simply happened later than a calendar assumed.

Hormones

What your hormones do in the luteal phase

Once an egg is released, the empty follicle in the ovary turns into the corpus luteum – Latin for “yellow body”, which is where the phase gets its name. It produces mostly progesterone, plus a second, smaller wave of estrogen.

Early luteal phase: Progesterone starts climbing and estrogen recovers from its dip around ovulation. Basal temperature moves up.
Mid-luteal phase: About a week after ovulation progesterone peaks and estrogen reaches a second, lower high. The uterine lining is now ready for a possible implantation.
Late luteal phase: Without a pregnancy the corpus luteum breaks down. Progesterone and estrogen fall over the last few days, the lining sheds and your period starts.

Progesterone does more than prepare the uterus. It nudges body temperature up, can slow digestion, affects fluid balance and, through its breakdown products, acts on signalling in the brain. That is why the luteal phase can show up far beyond the pelvis.

If a pregnancy begins, the embryo releases hCG. That hormone keeps the corpus luteum going, progesterone stays high and the period does not come.

Body

Common luteal phase symptoms

Plenty of people notice nothing much in the first week after ovulation. When symptoms do appear, they cluster in the last days before a period, as hormone levels drop. Commonly reported ones include:

tender or heavy-feeling breasts
bloating, constipation or a puffy, water-retention feeling
a bigger appetite or cravings, often for sweet or salty food
tiredness, lighter sleep or headaches
breakouts
dull cramping in the lower belly or lower back

Not everyone gets these, and intensity can change from cycle to cycle. Doctors talk about premenstrual syndrome (PMS) when symptoms show up reliably in the second half of the cycle, get in the way of daily life and ease off within a few days of your period starting.

Breast tenderness, fatigue and mild cramping are also possible early pregnancy signs. You cannot tell the two apart by feel alone; a test from the day your period is due gives a clearer answer.

If cravings are the part that bothers you most, we collected practical approaches in how to handle sugar cravings before your period.

Mood

Mood in the luteal phase

Feeling shorter-tempered, more sensitive, low or tense before a period is something many people recognise. Current research suggests this is less about having “too much” or “too little” of a hormone and more about how sensitive the brain is to the rise and fall of progesterone and estrogen, with messengers such as serotonin involved too. That helps explain why similar hormone levels can feel completely different from one person to the next.

A useful first step is simply noticing the pattern. Jotting down your mood for a few cycles shows whether the low days really line up with the week before your period. Some people then try to schedule demanding things on other days when they can, and protect sleep and downtime in that week.

When it is more than a bad mood: PMDD

For a smaller group, premenstrual mood symptoms are severe enough to disrupt work, relationships and everyday life: deep low mood, hopelessness, intense anxiety, anger or feeling out of control. This is called premenstrual dysphoric disorder (PMDD). It is a recognised condition with effective treatment options, and it is not something you have to grit your teeth through. Existing depression or anxiety can also get worse before a period.

If you are having thoughts of harming yourself, do not wait for your period to pass. Contact your local emergency number or a crisis line – in the US you can call or text 988, in the UK you can reach Samaritans on 116 123.

Medical advice

When to see a doctor

Book an appointment with your GP or gynecologist if any of these apply to you:

Premenstrual symptoms regularly make work, relationships or daily life hard to manage.
You have severe low mood, anxiety or hopelessness before your period. A GP or mental health professional can help here too.
Your luteal phase is repeatedly shorter than 10 days, or you spot for several days before your period – particularly if you are trying to get pregnant.
Your cycles are consistently shorter than 21 days or longer than 35, or suddenly become very irregular.
Your period does not arrive and pregnancy tests are negative, or bleeding is unusually heavy.
You develop new or severe pain that is not normal for you.

Bringing a simple log of bleeding days, symptoms and mood makes that conversation much easier.

Read on

The luteal phase and food

Feeling hungrier in the luteal phase is common. Which foods are worth paying attention to, what you might want to adjust and what a sample day can look like are covered in what to eat in your luteal phase. For ready-to-cook ideas, see our 10 luteal phase recipes.

Calculator

Am I in my luteal phase right now?

The cycle phase calculator uses the first day of your last period and your usual cycle length to estimate your phase today and when your next period might start. How it works, and where its limits are, is explained in our cycle phase calculator article. The result is an estimate based on averages and is not a method of contraception.

You can find the other three phases in the overview: menstruation, the follicular phase and ovulation.

FAQ

Luteal phase questions

How long is a normal luteal phase?

Usually about 11 to 14 days. It varies less than the follicular phase, so when your overall cycle length changes, it is mostly because ovulation came earlier or later.

How can I tell I am in my luteal phase?

Only by tracking ovulation. Signs include a raised waking temperature, thicker or drier cervical mucus and, for some, breast tenderness. A calendar or calculator can only give you an estimate.

Is a short luteal phase a problem?

If it is repeatedly shorter than 10 days, it is worth getting checked, especially if you are trying to conceive. One short cycle on its own is usually nothing to worry about.

Why am I so irritable before my period?

Many people are sensitive to the drop in progesterone and estrogen in the final days before a period. If the low mood is severe or seriously affects your daily life, it may be premenstrual dysphoric disorder (PMDD), which is treatable and worth discussing with a doctor.

Can you get pregnant during the luteal phase?

An egg can only be fertilised for roughly 12 to 24 hours after ovulation, so pregnancy late in the luteal phase is very unlikely. Because ovulation can shift, though, you cannot be sure when your luteal phase starts without tracking it. A calendar or calculator is not contraception.

What is the difference between the luteal phase and PMS?

The luteal phase is a part of every ovulatory cycle. PMS describes symptoms that reliably show up in the last days of that phase and fade once your period starts. Plenty of luteal phases come without PMS.

Is it PMS or early pregnancy?

Hard to tell by how you feel, because breast tenderness, tiredness and mild cramping happen with both. A pregnancy test from the day your period is due is the reliable way to know.

Sources

Note: This page is general information and does not replace medical advice. Cycle days are averages and your own cycle may differ. Neither this page nor the cycle phase calculator is a method of contraception or family planning.